#include <QtWidgets>
#include <QList>
#include <QPrinter>
#include <QPrintDialog>
#include <QPainter>
#include <QWebEnginePage>

#include "vmainwindow.h"
#include "vdirectorytree.h"
#include "vnote.h"
#include "vfilelist.h"
#include "vconfigmanager.h"
#include "utils/vutils.h"
#include "veditarea.h"
#include "voutline.h"
#include "vnotebookselector.h"
#include "dialog/vfindreplacedialog.h"
#include "dialog/vsettingsdialog.h"
#include "vcaptain.h"
#include "vedittab.h"
#include "vwebview.h"
#include "vexporter.h"
#include "vmdtab.h"
#include "vvimindicator.h"
#include "vvimcmdlineedit.h"
#include "vtabindicator.h"
#include "dialog/vupdater.h"
#include "vorphanfile.h"
#include "dialog/vorphanfileinfodialog.h"
#include "vsingleinstanceguard.h"
#include "vnotefile.h"
#include "vbuttonwithwidget.h"
#include "vattachmentlist.h"
#include "vfilesessioninfo.h"
#include "vsnippetlist.h"
#include "vtoolbox.h"
#include "vbuttonmenuitem.h"
#include "vpalette.h"
#include "utils/viconutils.h"
#include "dialog/vtipsdialog.h"
#include "vcart.h"
#include "dialog/vexportdialog.h"
#include "vsearcher.h"
#include "vuniversalentry.h"
#include "vsearchue.h"
#include "voutlineue.h"
#include "vhelpue.h"
#include "vlistfolderue.h"
#include "dialog/vfixnotebookdialog.h"
#include "vhistorylist.h"
#include "vexplorer.h"
#include "vlistue.h"
#include "vtagexplorer.h"
#include "vmdeditor.h"

extern VConfigManager *g_config;

extern VPalette *g_palette;

VMainWindow *g_mainWin;

VNote *g_vnote;

VWebUtils *g_webUtils;

const int VMainWindow::c_sharedMemTimerInterval = 1000;

#if defined(QT_NO_DEBUG)
extern QFile g_logFile;
#endif

#define COLOR_PIXMAP_ICON_SIZE 64

enum NaviBoxIndex
{
    NotebookPanel = 0,
    HistoryList,
    Explorer,
    TagExplorer
};


VMainWindow::VMainWindow(VSingleInstanceGuard *p_guard, QWidget *p_parent)
    : QMainWindow(p_parent),
      m_guard(p_guard),
      m_windowOldState(Qt::WindowNoState),
      m_requestQuit(false),
      m_printer(NULL),
      m_ue(NULL),
      m_syncNoteListToCurrentTab(true)
{
    qsrand(QDateTime::currentDateTime().toTime_t());

    g_mainWin = this;

    setWindowIcon(QIcon(":/resources/icons/vnote.ico"));

    vnote = new VNote(this);
    g_vnote = vnote;

    m_webUtils.init();
    g_webUtils = &m_webUtils;

    initCaptain();

    setupUI();

    initMenuBar();

    initToolBar();

    initShortcuts();

    initDockWindows();

    int state = g_config->getPanelViewState();
    if (state < 0 || state >= (int)PanelViewState::Invalid) {
        state = (int)PanelViewState::VerticalMode;
    }

    changePanelView((PanelViewState)state);

    restoreStateAndGeometry();

    setContextMenuPolicy(Qt::NoContextMenu);

    m_notebookSelector->update();

    initSharedMemoryWatcher();

    initUpdateTimer();

    registerCaptainAndNavigationTargets();
}

void VMainWindow::initSharedMemoryWatcher()
{
    m_sharedMemTimer = new QTimer(this);
    m_sharedMemTimer->setSingleShot(false);
    m_sharedMemTimer->setInterval(c_sharedMemTimerInterval);
    connect(m_sharedMemTimer, &QTimer::timeout,
            this, &VMainWindow::checkSharedMemory);

    m_sharedMemTimer->start();
}

void VMainWindow::initCaptain()
{
    // VCaptain should be visible to accpet key focus. But VCaptain
    // may hide other widgets.
    m_captain = new VCaptain(this);
    connect(m_captain, &VCaptain::captainModeChanged,
            this, [this](bool p_captainMode) {
                static QString normalStyle = m_avatarBtn->styleSheet();
                static QString captainStyle = QString("color: %1; background: %2;")
                                                     .arg(g_palette->color("avatar_captain_mode_fg"))
                                                     .arg(g_palette->color("avatar_captain_mode_bg"));

                if (p_captainMode) {
                    m_avatarBtn->setStyleSheet(captainStyle);
                } else {
                    m_avatarBtn->setStyleSheet(normalStyle);
                }
            });
}

void VMainWindow::registerCaptainAndNavigationTargets()
{
    m_captain->registerNavigationTarget(m_naviBox);
    m_captain->registerNavigationTarget(m_notebookSelector);
    m_captain->registerNavigationTarget(m_dirTree);
    m_captain->registerNavigationTarget(m_fileList);
    m_captain->registerNavigationTarget(m_historyList);

    m_tagExplorer->registerNavigationTarget();

    m_captain->registerNavigationTarget(m_editArea);

    m_tabIndicator->registerNavigationTarget();

    m_captain->registerNavigationTarget(m_toolBox);
    m_captain->registerNavigationTarget(outline);
    m_captain->registerNavigationTarget(m_snippetList);
    m_captain->registerNavigationTarget(m_cart);
    m_captain->registerNavigationTarget(m_searcher);

    // Register Captain mode targets.
    m_captain->registerCaptainTarget(tr("AttachmentList"),
                                     g_config->getCaptainShortcutKeySequence("AttachmentList"),
                                     this,
                                     showAttachmentListByCaptain);
    m_captain->registerCaptainTarget(tr("LocateCurrentFile"),
                                     g_config->getCaptainShortcutKeySequence("LocateCurrentFile"),
                                     this,
                                     locateCurrentFileByCaptain);
    m_captain->registerCaptainTarget(tr("ExpandMode"),
                                     g_config->getCaptainShortcutKeySequence("ExpandMode"),
                                     this,
                                     toggleExpandModeByCaptain);
    m_captain->registerCaptainTarget(tr("CurrentNoteInfo"),
                                     g_config->getCaptainShortcutKeySequence("CurrentNoteInfo"),
                                     this,
                                     currentNoteInfoByCaptain);
    m_captain->registerCaptainTarget(tr("DiscardAndRead"),
                                     g_config->getCaptainShortcutKeySequence("DiscardAndRead"),
                                     this,
                                     discardAndReadByCaptain);
    m_captain->registerCaptainTarget(tr("ToolBar"),
                                     g_config->getCaptainShortcutKeySequence("ToolBar"),
                                     this,
                                     toggleToolBarByCaptain);
    m_captain->registerCaptainTarget(tr("ToolsDock"),
                                     g_config->getCaptainShortcutKeySequence("ToolsDock"),
                                     this,
                                     toggleToolsDockByCaptain);
    m_captain->registerCaptainTarget(tr("SearchDock"),
                                     g_config->getCaptainShortcutKeySequence("SearchDock"),
                                     this,
                                     toggleSearchDockByCaptain);
    m_captain->registerCaptainTarget(tr("CloseNote"),
                                     g_config->getCaptainShortcutKeySequence("CloseNote"),
                                     this,
                                     closeFileByCaptain);
    m_captain->registerCaptainTarget(tr("ShortcutsHelp"),
                                     g_config->getCaptainShortcutKeySequence("ShortcutsHelp"),
                                     this,
                                     shortcutsHelpByCaptain);
    m_captain->registerCaptainTarget(tr("FlushLogFile"),
                                     g_config->getCaptainShortcutKeySequence("FlushLogFile"),
                                     this,
                                     flushLogFileByCaptain);
    m_captain->registerCaptainTarget(tr("Export"),
                                     g_config->getCaptainShortcutKeySequence("Export"),
                                     this,
                                     exportByCaptain);
    m_captain->registerCaptainTarget(tr("FocusEditArea"),
                                     g_config->getCaptainShortcutKeySequence("FocusEditArea"),
                                     this,
                                     focusEditAreaByCaptain);
}

void VMainWindow::setupUI()
{
    setupNaviBox();

    m_editArea = new VEditArea();
    m_editArea->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_findReplaceDialog = m_editArea->getFindReplaceDialog();
    m_fileList->setEditArea(m_editArea);
    m_dirTree->setEditArea(m_editArea);

    connect(m_editArea, &VEditArea::fileClosed,
            m_historyList, &VHistoryList::addFile);

    // Main Splitter
    m_mainSplitter = new QSplitter();
    m_mainSplitter->setObjectName("MainSplitter");
    m_mainSplitter->addWidget(m_naviBox);
    m_mainSplitter->addWidget(m_editArea);
    m_mainSplitter->setStretchFactor(0, 0);
    m_mainSplitter->setStretchFactor(1, 1);

    connect(m_dirTree, &VDirectoryTree::directoryUpdated,
            m_editArea, &VEditArea::handleDirectoryUpdated);

    connect(m_notebookSelector, &VNotebookSelector::notebookUpdated,
            m_editArea, &VEditArea::handleNotebookUpdated);
    connect(m_notebookSelector, &VNotebookSelector::notebookCreated,
            m_dirTree, [this](const QString &p_name, bool p_import) {
                Q_UNUSED(p_name);
                if (!p_import) {
                    m_dirTree->newRootDirectory();
                }
            });

    connect(m_fileList, &VFileList::fileClicked,
            m_editArea, &VEditArea::openFile);
    connect(m_fileList, &VFileList::fileCreated,
            m_editArea, [this](VNoteFile *p_file,
                               OpenFileMode p_mode,
                               bool p_forceMode) {
                if (p_file->getDocType() == DocType::Markdown
                    || p_file->getDocType() == DocType::Html) {
                    m_editArea->openFile(p_file, p_mode, p_forceMode);
                }
            });
    connect(m_fileList, &VFileList::fileUpdated,
            m_editArea, &VEditArea::handleFileUpdated);
    connect(m_editArea, &VEditArea::tabStatusUpdated,
            this, &VMainWindow::handleAreaTabStatusUpdated);
    connect(m_editArea, &VEditArea::statusMessage,
            this, &VMainWindow::showStatusMessage);
    connect(m_editArea, &VEditArea::vimStatusUpdated,
            this, &VMainWindow::handleVimStatusUpdated);
    connect(m_findReplaceDialog, &VFindReplaceDialog::findTextChanged,
            this, &VMainWindow::handleFindDialogTextChanged);

    setCentralWidget(m_mainSplitter);

    initVimCmd();

    m_vimIndicator = new VVimIndicator(this);
    m_vimIndicator->hide();

    m_tabIndicator = new VTabIndicator(this);
    m_tabIndicator->hide();

    // Create and show the status bar
    statusBar()->addPermanentWidget(m_vimCmd);
    statusBar()->addPermanentWidget(m_vimIndicator);
    statusBar()->addPermanentWidget(m_tabIndicator);

    initTrayIcon();
}

void VMainWindow::setupNaviBox()
{
    m_naviBox = new VToolBox();
    m_naviBox->setObjectName("MainToolBox");

    setupNotebookPanel();
    m_naviBox->addItem(m_nbSplitter,
                       ":/resources/icons/notebook.svg",
                       tr("Notebooks"),
                       m_dirTree);

    m_historyList = new VHistoryList();
    m_naviBox->addItem(m_historyList,
                       ":/resources/icons/history.svg",
                       tr("History"));

    m_explorer = new VExplorer();
    m_naviBox->addItem(m_explorer,
                       ":/resources/icons/explorer.svg",
                       tr("Explorer"));

    m_tagExplorer = new VTagExplorer();
    m_naviBox->addItem(m_tagExplorer,
                       ":/resources/icons/tag_explorer.svg",
                       tr("Tags"));
    connect(m_notebookSelector, &VNotebookSelector::curNotebookChanged,
            m_tagExplorer, &VTagExplorer::setNotebook);

    connect(m_fileList, &VFileList::requestSplitOut,
            this, &VMainWindow::splitFileListOut);
}

void VMainWindow::setupNotebookPanel()
{
    m_notebookSelector = new VNotebookSelector();
    m_notebookSelector->setObjectName("NotebookSelector");
    m_notebookSelector->setSizeAdjustPolicy(QComboBox::AdjustToMinimumContentsLengthWithIcon);

    // Folders.
    QLabel *directoryLabel = new QLabel(tr("Folders"));
    directoryLabel->setProperty("TitleLabel", true);

    m_dirTree = new VDirectoryTree;

    QVBoxLayout *naviLayout = new QVBoxLayout;
    naviLayout->addWidget(m_notebookSelector);
    naviLayout->addWidget(directoryLabel);
    naviLayout->addWidget(m_dirTree);
    naviLayout->setContentsMargins(0, 0, 0, 0);
    naviLayout->setSpacing(0);
    QWidget *naviWidget = new QWidget();
    naviWidget->setLayout(naviLayout);

    // Notes.
    m_fileList = new VFileList();
    m_fileList->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Expanding);

    m_nbSplitter = new QSplitter();
    m_nbSplitter->setObjectName("NotebookSplitter");
    m_nbSplitter->addWidget(naviWidget);
    m_nbSplitter->addWidget(m_fileList);

    setupFileListSplitOut(g_config->getEnableSplitFileList());

    connect(m_notebookSelector, &VNotebookSelector::curNotebookChanged,
            this, [this](VNotebook *p_notebook) {
                m_dirTree->setNotebook(p_notebook);
                m_dirTree->setFocus();
            });

    connect(m_notebookSelector, &VNotebookSelector::curNotebookChanged,
            this, &VMainWindow::handleCurrentNotebookChanged);

    connect(m_dirTree, &VDirectoryTree::currentDirectoryChanged,
            this, &VMainWindow::handleCurrentDirectoryChanged);

    connect(m_dirTree, &VDirectoryTree::currentDirectoryChanged,
            m_fileList, &VFileList::setDirectory);
}

void VMainWindow::initToolBar()
{
    const int tbIconSize = g_config->getToolBarIconSize() * VUtils::calculateScaleFactor();
    QSize iconSize(tbIconSize, tbIconSize);

    m_toolBars.append(initFileToolBar(iconSize));
    m_toolBars.append(initViewToolBar(iconSize));
    m_toolBars.append(initEditToolBar(iconSize));
    m_toolBars.append(initNoteToolBar(iconSize));

    setToolBarVisible(g_config->getToolBarChecked());
}

QToolBar *VMainWindow::initViewToolBar(QSize p_iconSize)
{
    m_viewToolBar = addToolBar(tr("View"));
    m_viewToolBar->setObjectName("ViewToolBar");
    m_viewToolBar->setMovable(false);
    if (p_iconSize.isValid()) {
        m_viewToolBar->setIconSize(p_iconSize);
    }

    QAction *fullScreenAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/fullscreen.svg"),
                                         tr("Full Screen"),
                                         this);
    QString keySeq = g_config->getShortcutKeySequence("FullScreen");
    QKeySequence seq(keySeq);
    if (!seq.isEmpty()) {
        fullScreenAct->setText(tr("Full Screen\t%1").arg(VUtils::getShortcutText(keySeq)));
        fullScreenAct->setShortcut(seq);
    }

    fullScreenAct->setStatusTip(tr("Toggle full screen"));
    connect(fullScreenAct, &QAction::triggered,
            this, [this]() {
                if (windowState() & Qt::WindowFullScreen) {
                    if (m_windowOldState & Qt::WindowMaximized) {
                        showMaximized();
                    } else {
                        showNormal();
                    }
                } else {
                    showFullScreen();
                }
            });

    QAction *stayOnTopAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/stay_on_top.svg"),
                                        tr("Stay On Top"),
                                        this);
    stayOnTopAct->setStatusTip(tr("Toggle stay-on-top"));
    stayOnTopAct->setCheckable(true);
    connect(stayOnTopAct, &QAction::triggered,
            this, &VMainWindow::stayOnTop);

    QAction *menuBarAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/menubar.svg"),
                                      tr("Menu Bar"),
                                      this);
    menuBarAct->setStatusTip(tr("Toggle menu bar"));
    menuBarAct->setCheckable(true);
    menuBarAct->setChecked(g_config->getMenuBarChecked());
    connect(menuBarAct, &QAction::triggered,
            this, [this](bool p_checked) {
                setMenuBarVisible(p_checked);
                g_config->setMenuBarChecked(p_checked);
            });

    QMenu *viewMenu = new QMenu(this);
    viewMenu->setToolTipsVisible(true);
    viewMenu->addAction(fullScreenAct);
    viewMenu->addAction(stayOnTopAct);
    viewMenu->addAction(menuBarAct);

    expandViewAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/expand.svg"),
                                tr("Expand Edit Area"),
                                this);
    VUtils::fixTextWithCaptainShortcut(expandViewAct, "ExpandMode");
    expandViewAct->setStatusTip(tr("Expand the edit area"));
    expandViewAct->setCheckable(true);
    expandViewAct->setMenu(viewMenu);
    connect(expandViewAct, &QAction::triggered,
            this, [this](bool p_checked) {
                changePanelView(p_checked ? PanelViewState::ExpandMode
                                          : PanelViewState::VerticalMode);
            });

    m_viewToolBar->addAction(expandViewAct);

    return m_viewToolBar;
}

// Enable/disable all actions of @p_widget.
static void setActionsEnabled(QWidget *p_widget, bool p_enabled)
{
    Q_ASSERT(p_widget);
    QList<QAction *> actions = p_widget->actions();
    for (auto const & act : actions) {
        act->setEnabled(p_enabled);
    }
}

QToolBar *VMainWindow::initEditToolBar(QSize p_iconSize)
{
    m_editToolBar = addToolBar(tr("Edit Toolbar"));
    m_editToolBar->setObjectName("EditToolBar");
    m_editToolBar->setMovable(false);
    if (p_iconSize.isValid()) {
        m_editToolBar->setIconSize(p_iconSize);
    }

    m_editToolBar->addSeparator();

    m_headingSequenceAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/heading_sequence.svg"),
                                       tr("Heading Sequence"),
                                       this);
    m_headingSequenceAct->setStatusTip(tr("Enable heading sequence in current note in edit mode"));
    m_headingSequenceAct->setCheckable(true);
    connect(m_headingSequenceAct, &QAction::triggered,
            this, [this](bool p_checked){
                if (isHeadingSequenceApplicable()) {
                    VMdTab *tab = dynamic_cast<VMdTab *>(m_curTab.data());
                    Q_ASSERT(tab);
                    tab->enableHeadingSequence(p_checked);
                }
            });

    m_editToolBar->addAction(m_headingSequenceAct);

    initHeadingButton(m_editToolBar);

    QAction *boldAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/bold.svg"),
                                   tr("Bold\t%1").arg(VUtils::getShortcutText("Ctrl+B")),
                                   this);
    boldAct->setStatusTip(tr("Insert bold text or change selected text to bold"));
    connect(boldAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->decorateText(TextDecoration::Bold);
                }
            });

    m_editToolBar->addAction(boldAct);

    QAction *italicAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/italic.svg"),
                                     tr("Italic\t%1").arg(VUtils::getShortcutText("Ctrl+I")),
                                     this);
    italicAct->setStatusTip(tr("Insert italic text or change selected text to italic"));
    connect(italicAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->decorateText(TextDecoration::Italic);
                }
            });

    m_editToolBar->addAction(italicAct);

    QAction *strikethroughAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/strikethrough.svg"),
                                            tr("Strikethrough\t%1").arg(VUtils::getShortcutText("Ctrl+D")),
                                            this);
    strikethroughAct->setStatusTip(tr("Insert strikethrough text or change selected text to strikethroughed"));
    connect(strikethroughAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->decorateText(TextDecoration::Strikethrough);
                }
            });

    m_editToolBar->addAction(strikethroughAct);

    QAction *inlineCodeAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/inline_code.svg"),
                                         tr("Inline Code\t%1").arg(VUtils::getShortcutText("Ctrl+;")),
                                         this);
    inlineCodeAct->setStatusTip(tr("Insert inline-code text or change selected text to inline-coded"));
    connect(inlineCodeAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->decorateText(TextDecoration::InlineCode);
                }
            });

    m_editToolBar->addAction(inlineCodeAct);

    QAction *codeBlockAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/code_block.svg"),
                                        tr("Code Block\t%1").arg(VUtils::getShortcutText("Ctrl+M")),
                                        this);
    codeBlockAct->setStatusTip(tr("Insert fenced code block text or wrap selected text into a fenced code block"));
    connect(codeBlockAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->decorateText(TextDecoration::CodeBlock);
                }
            });

    m_editToolBar->addAction(codeBlockAct);

    QAction *tableAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/table.svg"),
                                    tr("Table\t%1").arg(VUtils::getShortcutText("Ctrl+.")),
                                    this);
    tableAct->setStatusTip(tr("Insert a table"));
    connect(tableAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->insertTable();
                }
            });

    m_editToolBar->addAction(tableAct);

    // Insert link.
    QAction *insetLinkAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/link.svg"),
                                        tr("Link\t%1").arg(VUtils::getShortcutText("Ctrl+L")),
                                        this);
    insetLinkAct->setStatusTip(tr("Insert a link"));
    connect(insetLinkAct, &QAction::triggered,
            this, [this]() {
                if (m_curTab) {
                    m_curTab->insertLink();
                }
            });

    m_editToolBar->addAction(insetLinkAct);

    // Insert image.
    QAction *insertImageAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/insert_image.svg"),
                                          tr("Image\t%1").arg(VUtils::getShortcutText("Ctrl+'")),
                                          this);
    insertImageAct->setStatusTip(tr("Insert an image from file or URL"));
    connect(insertImageAct, &QAction::triggered,
            this, [this]() {
                if (m_curTab) {
                    m_curTab->insertImage();
                }
            });

    m_editToolBar->addAction(insertImageAct);

    setActionsEnabled(m_editToolBar, false);

    return m_editToolBar;
}

QToolBar *VMainWindow::initNoteToolBar(QSize p_iconSize)
{
    m_noteToolBar = addToolBar(tr("Note Toolbar"));
    m_noteToolBar->setObjectName("NoteToolBar");
    m_noteToolBar->setMovable(false);
    if (p_iconSize.isValid()) {
        m_noteToolBar->setIconSize(p_iconSize);
    }

    m_noteToolBar->addSeparator();

    // Attachment.
    m_attachmentList = new VAttachmentList(this);
    m_attachmentBtn = new VButtonWithWidget(VIconUtils::toolButtonIcon(":/resources/icons/attachment.svg"),
                                            "",
                                            m_attachmentList,
                                            this);
    m_attachmentBtn->setBubbleColor(g_palette->color("bubble_fg"),
                                    g_palette->color("bubble_bg"));
    m_attachmentBtn->setToolTip(tr("Attachments (drag files here to add attachments)"));
    m_attachmentBtn->setProperty("CornerBtn", true);
    m_attachmentBtn->setFocusPolicy(Qt::NoFocus);
    m_attachmentBtn->setEnabled(false);

    QAction *flashPageAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/flash_page.svg"),
                                        tr("Flash Page"),
                                        this);
    flashPageAct->setStatusTip(tr("Open the Flash Page to edit"));
    QString keySeq = g_config->getShortcutKeySequence("FlashPage");
    QKeySequence seq(keySeq);
    if (!seq.isEmpty()) {
        flashPageAct->setText(tr("Flash Page\t%1").arg(VUtils::getShortcutText(keySeq)));
        flashPageAct->setShortcut(seq);
    }

    connect(flashPageAct, &QAction::triggered,
            this, &VMainWindow::openFlashPage);

    QAction *quickAccessAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/quick_access.svg"),
                                          tr("Quick Access"),
                                          this);
    quickAccessAct->setStatusTip(tr("Open quick access note"));
    keySeq = g_config->getShortcutKeySequence("QuickAccess");
    seq = QKeySequence(keySeq);
    if (!seq.isEmpty()) {
        quickAccessAct->setText(tr("Quick Access\t%1").arg(VUtils::getShortcutText(keySeq)));
        quickAccessAct->setShortcut(seq);
    }

    connect(quickAccessAct, &QAction::triggered,
            this, &VMainWindow::openQuickAccess);

    QAction *universalEntryAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/universal_entry_tb.svg"),
                                             tr("Universal Entry"),
                                             this);
    universalEntryAct->setStatusTip(tr("Activate Universal Entry"));
    keySeq = g_config->getShortcutKeySequence("UniversalEntry");
    seq = QKeySequence(keySeq);
    if (!seq.isEmpty()) {
        universalEntryAct->setText(tr("Universal Entry\t%1").arg(VUtils::getShortcutText(keySeq)));
        universalEntryAct->setShortcut(seq);
    }

    connect(universalEntryAct, &QAction::triggered,
            this, &VMainWindow::activateUniversalEntry);

    m_noteToolBar->addWidget(m_attachmentBtn);
    m_noteToolBar->addAction(flashPageAct);
    m_noteToolBar->addAction(quickAccessAct);
    m_noteToolBar->addAction(universalEntryAct);

    return m_noteToolBar;
}

QToolBar *VMainWindow::initFileToolBar(QSize p_iconSize)
{
    m_fileToolBar = addToolBar(tr("Note"));
    m_fileToolBar->setObjectName("FileToolBar");
    m_fileToolBar->setMovable(false);
    if (p_iconSize.isValid()) {
        m_fileToolBar->setIconSize(p_iconSize);
    }

    m_avatarBtn = new QPushButton("VNote", this);
    m_avatarBtn->setProperty("AvatarBtn", true);
    m_avatarBtn->setFocusPolicy(Qt::NoFocus);
    m_avatarBtn->setToolTip(tr("Log In (Not Implemented Yet)"));

    newRootDirAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/create_rootdir_tb.svg"),
                                tr("New Root Folder"),
                                this);
    newRootDirAct->setStatusTip(tr("Create a root folder in current notebook"));
    connect(newRootDirAct, &QAction::triggered,
            m_dirTree, &VDirectoryTree::newRootDirectory);

    newNoteAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/create_note_tb.svg"),
                             tr("New Note"), this);
    newNoteAct->setStatusTip(tr("Create a note in current folder"));
    QString keySeq = g_config->getShortcutKeySequence("NewNote");
    QKeySequence seq(keySeq);
    if (!seq.isEmpty()) {
        newNoteAct->setText(tr("New Note\t%1").arg(VUtils::getShortcutText(keySeq)));
        newNoteAct->setShortcut(seq);
    }

    connect(newNoteAct, &QAction::triggered,
            m_fileList, &VFileList::newFile);

    noteInfoAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/note_info_tb.svg"),
                              tr("Note Info"),
                              this);
    VUtils::fixTextWithCaptainShortcut(noteInfoAct, "CurrentNoteInfo");
    noteInfoAct->setStatusTip(tr("View and edit current note's information"));
    connect(noteInfoAct, &QAction::triggered,
            this, &VMainWindow::curEditFileInfo);

    deleteNoteAct = new QAction(VIconUtils::toolButtonDangerIcon(":/resources/icons/delete_note_tb.svg"),
                                tr("Delete Note"), this);
    deleteNoteAct->setStatusTip(tr("Delete current note"));
    connect(deleteNoteAct, &QAction::triggered,
            this, &VMainWindow::deleteCurNote);

    m_editReadAct = new QAction(this);
    connect(m_editReadAct, &QAction::triggered,
            this, &VMainWindow::toggleEditReadMode);

    m_discardExitAct = new QAction(VIconUtils::menuIcon(":/resources/icons/discard_exit.svg"),
                                   tr("Discard Changes And Read"),
                                   this);
    VUtils::fixTextWithCaptainShortcut(m_discardExitAct, "DiscardAndRead");
    m_discardExitAct->setStatusTip(tr("Discard changes and exit edit mode"));
    connect(m_discardExitAct, &QAction::triggered,
            this, [this]() {
                m_editArea->readFile(true);
            });

    updateEditReadAct(NULL);

    saveNoteAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/save_note.svg"),
                              tr("Save"), this);
    saveNoteAct->setStatusTip(tr("Save changes to current note"));
    keySeq = g_config->getShortcutKeySequence("SaveNote");
    seq = QKeySequence(keySeq);
    if (!seq.isEmpty()) {
        saveNoteAct->setText(tr("Save\t%1").arg(VUtils::getShortcutText(keySeq)));
        saveNoteAct->setShortcut(seq);
    }

    connect(saveNoteAct, &QAction::triggered,
            m_editArea, &VEditArea::saveFile);

    newRootDirAct->setEnabled(false);
    newNoteAct->setEnabled(false);
    noteInfoAct->setEnabled(false);
    deleteNoteAct->setEnabled(false);
    m_editReadAct->setEnabled(false);
    m_discardExitAct->setEnabled(false);
    saveNoteAct->setEnabled(false);

    m_fileToolBar->addWidget(m_avatarBtn);
    m_fileToolBar->addAction(newRootDirAct);
    m_fileToolBar->addAction(newNoteAct);
    m_fileToolBar->addAction(deleteNoteAct);
    m_fileToolBar->addAction(noteInfoAct);
    m_fileToolBar->addAction(m_editReadAct);
    m_fileToolBar->addAction(m_discardExitAct);
    m_fileToolBar->addAction(saveNoteAct);

    return m_fileToolBar;
}

void VMainWindow::initMenuBar()
{
    initFileMenu();
    initEditMenu();
    initViewMenu();
    initMarkdownMenu();
    initHelpMenu();

    setMenuBarVisible(g_config->getMenuBarChecked());
}

void VMainWindow::initHelpMenu()
{
    QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
    helpMenu->setToolTipsVisible(true);

#if defined(QT_NO_DEBUG)
    QAction *logAct = new QAction(tr("View &Log"), this);
    logAct->setToolTip(tr("View VNote's debug log (%1)").arg(g_config->getLogFilePath()));
    connect(logAct, &QAction::triggered,
            this, [](){
                QUrl url = QUrl::fromLocalFile(g_config->getLogFilePath());
                QDesktopServices::openUrl(url);
            });
#endif

    QAction *shortcutAct = new QAction(tr("&Shortcuts Help"), this);
    shortcutAct->setToolTip(tr("View information about shortcut keys"));
    VUtils::fixTextWithCaptainShortcut(shortcutAct, "ShortcutsHelp");
    connect(shortcutAct, &QAction::triggered,
            this, &VMainWindow::shortcutsHelp);

    QAction *mdGuideAct = new QAction(tr("&Markdown Guide"), this);
    mdGuideAct->setToolTip(tr("A quick guide of Markdown syntax"));
    connect(mdGuideAct, &QAction::triggered,
            this, [this](){
                QString docFile = VUtils::getDocFile(VNote::c_markdownGuideDocFile);
                VFile *file = vnote->getFile(docFile, true);
                m_editArea->openFile(file, OpenFileMode::Read);
            });

    QAction *docAct = new QAction(tr("&Documentation"), this);
    docAct->setToolTip(tr("View VNote's documentation"));
    connect(docAct, &QAction::triggered,
            this, []() {
                QString url("https://tamlok.github.io/vnote");
                QDesktopServices::openUrl(url);
            });

    QAction *donateAct = new QAction(tr("Do&nate"), this);
    donateAct->setToolTip(tr("Donate to VNote or view the donate list"));
    connect(donateAct, &QAction::triggered,
            this, []() {
                QString url("https://tamlok.github.io/vnote/en_us/#!donate.md");
                QDesktopServices::openUrl(url);
            });

    QAction *updateAct = new QAction(tr("Check For &Updates"), this);
    updateAct->setToolTip(tr("Check for updates of VNote"));
    connect(updateAct, &QAction::triggered,
            this, [this](){
                VUpdater updater(this);
                updater.exec();
            });

    QAction *starAct = new QAction(tr("Star VNote on &GitHub"), this);
    starAct->setToolTip(tr("Give a star to VNote on GitHub project"));
    connect(starAct, &QAction::triggered,
            this, []() {
                QString url("https://github.com/tamlok/vnote");
                QDesktopServices::openUrl(url);
            });

    QAction *feedbackAct = new QAction(tr("&Feedback"), this);
    feedbackAct->setToolTip(tr("Open an issue on GitHub"));
    connect(feedbackAct, &QAction::triggered,
            this, []() {
                QString url("https://github.com/tamlok/vnote/issues");
                QDesktopServices::openUrl(url);
            });

    QAction *aboutAct = new QAction(tr("&About VNote"), this);
    aboutAct->setToolTip(tr("View information about VNote"));
    aboutAct->setMenuRole(QAction::AboutRole);
    connect(aboutAct, &QAction::triggered,
            this, &VMainWindow::aboutMessage);

    QAction *aboutQtAct = new QAction(tr("About &Qt"), this);
    aboutQtAct->setToolTip(tr("View information about Qt"));
    aboutQtAct->setMenuRole(QAction::AboutQtRole);
    connect(aboutQtAct, &QAction::triggered,
            qApp, &QApplication::aboutQt);

    helpMenu->addAction(shortcutAct);
    helpMenu->addAction(mdGuideAct);
    helpMenu->addAction(docAct);
    helpMenu->addAction(donateAct);
    helpMenu->addAction(updateAct);
    helpMenu->addAction(starAct);
    helpMenu->addAction(feedbackAct);

#if defined(QT_NO_DEBUG)
    helpMenu->addAction(logAct);
#endif

    helpMenu->addAction(aboutQtAct);
    helpMenu->addAction(aboutAct);
}

void VMainWindow::initMarkdownMenu()
{
    QMenu *markdownMenu = menuBar()->addMenu(tr("&Markdown"));
    markdownMenu->setToolTipsVisible(true);

    initConverterMenu(markdownMenu);

    initMarkdownitOptionMenu(markdownMenu);

    markdownMenu->addSeparator();

    initRenderStyleMenu(markdownMenu);

    initRenderBackgroundMenu(markdownMenu);

    initCodeBlockStyleMenu(markdownMenu);

    QAction *constrainImageAct = new QAction(tr("Constrain The Width Of Images"), this);
    constrainImageAct->setToolTip(tr("Constrain the width of images to the window in read mode (re-open current tabs to make it work)"));
    constrainImageAct->setCheckable(true);
    connect(constrainImageAct, &QAction::triggered,
            this, &VMainWindow::enableImageConstraint);
    markdownMenu->addAction(constrainImageAct);
    constrainImageAct->setChecked(g_config->getEnableImageConstraint());

    QAction *imageCaptionAct = new QAction(tr("Enable Image Caption"), this);
    imageCaptionAct->setToolTip(tr("Center the images and display the alt text as caption (re-open current tabs to make it work)"));
    imageCaptionAct->setCheckable(true);
    connect(imageCaptionAct, &QAction::triggered,
            this, &VMainWindow::enableImageCaption);
    markdownMenu->addAction(imageCaptionAct);
    imageCaptionAct->setChecked(g_config->getEnableImageCaption());

    markdownMenu->addSeparator();

    initMarkdownExtensionMenu(markdownMenu);

    markdownMenu->addSeparator();

    QAction *codeBlockAct = new QAction(tr("Highlight Code Blocks In Edit Mode"), this);
    codeBlockAct->setToolTip(tr("Enable syntax highlight within code blocks in edit mode"));
    codeBlockAct->setCheckable(true);
    connect(codeBlockAct, &QAction::triggered,
            this, &VMainWindow::enableCodeBlockHighlight);
    markdownMenu->addAction(codeBlockAct);
    codeBlockAct->setChecked(g_config->getEnableCodeBlockHighlight());

    QAction *lineNumberAct = new QAction(tr("Display Line Number In Code Blocks"), this);
    lineNumberAct->setToolTip(tr("Enable line number in code blocks in read mode"));
    lineNumberAct->setCheckable(true);
    connect(lineNumberAct, &QAction::triggered,
            this, [](bool p_checked){
                g_config->setEnableCodeBlockLineNumber(p_checked);
            });
    markdownMenu->addAction(lineNumberAct);
    lineNumberAct->setChecked(g_config->getEnableCodeBlockLineNumber());

    QAction *previewImageAct = new QAction(tr("In-Place Preview"), this);
    previewImageAct->setToolTip(tr("Enable in-place preview (images, diagrams, and formulas) in edit mode (re-open current tabs to make it work)"));
    previewImageAct->setCheckable(true);
    connect(previewImageAct, &QAction::triggered,
            this, &VMainWindow::enableImagePreview);
    markdownMenu->addAction(previewImageAct);
    previewImageAct->setChecked(g_config->getEnablePreviewImages());

    QAction *previewWidthAct = new QAction(tr("Constrain The Width Of In-Place Preview"), this);
    previewWidthAct->setToolTip(tr("Constrain the width of in-place preview to the edit window in edit mode"));
    previewWidthAct->setCheckable(true);
    connect(previewWidthAct, &QAction::triggered,
            this, &VMainWindow::enableImagePreviewConstraint);
    markdownMenu->addAction(previewWidthAct);
    previewWidthAct->setChecked(g_config->getEnablePreviewImageConstraint());
}

void VMainWindow::initViewMenu()
{
    m_viewMenu = menuBar()->addMenu(tr("&View"));
    m_viewMenu->setToolTipsVisible(true);

    m_toolBarAct = new QAction(tr("Tool Bar"), this);
    m_toolBarAct->setToolTip(tr("Toogle the tool bar"));
    VUtils::fixTextWithCaptainShortcut(m_toolBarAct, "ToolBar");
    m_toolBarAct->setCheckable(true);
    m_toolBarAct->setChecked(g_config->getToolBarChecked());
    connect(m_toolBarAct, &QAction::triggered,
            this, [this] (bool p_checked) {
                g_config->setToolBarChecked(p_checked);
                setToolBarVisible(p_checked);
            });

    m_viewMenu->addAction(m_toolBarAct);
}

void VMainWindow::initFileMenu()
{
    QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
    fileMenu->setToolTipsVisible(true);

    // Open external files.
    QAction *openAct = new QAction(tr("&Open"), this);
    openAct->setToolTip(tr("Open external file to edit"));
    connect(openAct, &QAction::triggered,
            this, [this](){
                static QString lastPath = QDir::homePath();
                QStringList files = QFileDialog::getOpenFileNames(this,
                                                                  tr("Select External Files To Open"),
                                                                  lastPath);

                if (files.isEmpty()) {
                    return;
                }

                // Update lastPath
                lastPath = QFileInfo(files[0]).path();

                openFiles(VUtils::filterFilePathsToOpen(files),
                          false,
                          g_config->getNoteOpenMode(),
                          false,
                          false);
            });

    fileMenu->addAction(openAct);

    // Import notes from files.
    m_importNoteAct = newAction(VIconUtils::menuIcon(":/resources/icons/import_note.svg"),
                                tr("&New Notes From Files"), this);
    m_importNoteAct->setToolTip(tr("Create notes from external files in current folder "
                                   "(will copy files if they do not locate in current folder)"));
    connect(m_importNoteAct, &QAction::triggered,
            this, &VMainWindow::importNoteFromFile);
    m_importNoteAct->setEnabled(false);

    fileMenu->addAction(m_importNoteAct);

    fileMenu->addSeparator();

    // Export as PDF.
    m_exportAct = new QAction(tr("E&xport"), this);
    m_exportAct->setToolTip(tr("Export notes"));
    VUtils::fixTextWithCaptainShortcut(m_exportAct, "Export");
    connect(m_exportAct, &QAction::triggered,
            this, &VMainWindow::handleExportAct);

    fileMenu->addAction(m_exportAct);

    // Print.
    m_printAct = new QAction(VIconUtils::menuIcon(":/resources/icons/print.svg"),
                             tr("&Print"), this);
    m_printAct->setToolTip(tr("Print current note"));
    connect(m_printAct, &QAction::triggered,
            this, &VMainWindow::printNote);
    m_printAct->setEnabled(false);

    fileMenu->addAction(m_printAct);

    fileMenu->addSeparator();

    // Themes.
    initThemeMenu(fileMenu);

    // Settings.
    QAction *settingsAct = newAction(VIconUtils::menuIcon(":/resources/icons/settings.svg"),
                                     tr("&Settings"), this);
    settingsAct->setToolTip(tr("View and change settings for VNote"));
    settingsAct->setMenuRole(QAction::PreferencesRole);
    connect(settingsAct, &QAction::triggered,
            this, &VMainWindow::viewSettings);

    fileMenu->addAction(settingsAct);

    QAction *openConfigAct = new QAction(tr("Open Configuration Folder"), this);
    openConfigAct->setToolTip(tr("Open configuration folder of VNote"));
    connect(openConfigAct, &QAction::triggered,
            this, [](){
                QUrl url = QUrl::fromLocalFile(g_config->getConfigFolder());
                QDesktopServices::openUrl(url);
            });

    fileMenu->addAction(openConfigAct);

    QAction *customShortcutAct = new QAction(tr("Customize Shortcuts"), this);
    customShortcutAct->setToolTip(tr("Customize some standard shortcuts"));
    connect(customShortcutAct, &QAction::triggered,
            this, &VMainWindow::customShortcut);

    fileMenu->addAction(customShortcutAct);

    fileMenu->addSeparator();

    // Restart.
    QAction *restartAct = new QAction(tr("Restart"), this);
    connect(restartAct, &QAction::triggered,
            this, &VMainWindow::restartVNote);
    fileMenu->addAction(restartAct);

    // Exit.
    QAction *exitAct = new QAction(tr("&Quit"), this);
    exitAct->setToolTip(tr("Quit VNote"));
    exitAct->setShortcut(QKeySequence("Ctrl+Q"));
    exitAct->setMenuRole(QAction::QuitRole);
    connect(exitAct, &QAction::triggered,
            this, &VMainWindow::quitApp);

    fileMenu->addAction(exitAct);
}

void VMainWindow::quitApp()
{
    m_requestQuit = true;
    close();
}

void VMainWindow::initEditMenu()
{
    QMenu *editMenu = menuBar()->addMenu(tr("&Edit"));
    editMenu->setToolTipsVisible(true);

    // Find/Replace.
    m_findReplaceAct = newAction(VIconUtils::menuIcon(":/resources/icons/find_replace.svg"),
                                 tr("Find/Replace"), this);
    m_findReplaceAct->setToolTip(tr("Open Find/Replace dialog to search in current note"));
    QString keySeq = g_config->getShortcutKeySequence("Find");
    qDebug() << "set Find shortcut to" << keySeq;
    m_findReplaceAct->setShortcut(QKeySequence(keySeq));
    connect(m_findReplaceAct, &QAction::triggered,
            this, &VMainWindow::openFindDialog);

    QAction *advFindAct = new QAction(tr("Advanced Find"), this);
    advFindAct->setToolTip(tr("Advanced find within VNote"));
    keySeq = g_config->getShortcutKeySequence("AdvancedFind");
    qDebug() << "set AdvancedFind shortcut to" << keySeq;
    advFindAct->setShortcut(QKeySequence(keySeq));
    connect(advFindAct, &QAction::triggered,
            this, [this]() {
                m_searchDock->setVisible(true);
                m_searcher->focusToSearch();
            });

    m_findNextAct = new QAction(tr("Find Next"), this);
    m_findNextAct->setToolTip(tr("Find next occurence"));
    keySeq = g_config->getShortcutKeySequence("FindNext");
    qDebug() << "set FindNext shortcut to" << keySeq;
    m_findNextAct->setShortcut(QKeySequence(keySeq));
    connect(m_findNextAct, SIGNAL(triggered(bool)),
            m_findReplaceDialog, SLOT(findNext()));

    m_findPreviousAct = new QAction(tr("Find Previous"), this);
    m_findPreviousAct->setToolTip(tr("Find previous occurence"));
    keySeq = g_config->getShortcutKeySequence("FindPrevious");
    qDebug() << "set FindPrevious shortcut to" << keySeq;
    m_findPreviousAct->setShortcut(QKeySequence(keySeq));
    connect(m_findPreviousAct, SIGNAL(triggered(bool)),
            m_findReplaceDialog, SLOT(findPrevious()));

    m_replaceAct = new QAction(tr("Replace"), this);
    m_replaceAct->setToolTip(tr("Replace current occurence"));
    connect(m_replaceAct, SIGNAL(triggered(bool)),
            m_findReplaceDialog, SLOT(replace()));

    m_replaceFindAct = new QAction(tr("Replace && Find"), this);
    m_replaceFindAct->setToolTip(tr("Replace current occurence and find the next one"));
    connect(m_replaceFindAct, SIGNAL(triggered(bool)),
            m_findReplaceDialog, SLOT(replaceFind()));

    m_replaceAllAct = new QAction(tr("Replace All"), this);
    m_replaceAllAct->setToolTip(tr("Replace all occurences in current note"));
    connect(m_replaceAllAct, SIGNAL(triggered(bool)),
            m_findReplaceDialog, SLOT(replaceAll()));

    QAction *searchedWordAct = new QAction(tr("Highlight Searched Pattern"), this);
    searchedWordAct->setToolTip(tr("Highlight all occurences of searched pattern"));
    searchedWordAct->setCheckable(true);
    connect(searchedWordAct, &QAction::triggered,
            this, &VMainWindow::changeHighlightSearchedWord);

    // Expand Tab into spaces.
    QAction *expandTabAct = new QAction(tr("&Expand Tab"), this);
    expandTabAct->setToolTip(tr("Expand entered Tab to spaces"));
    expandTabAct->setCheckable(true);
    connect(expandTabAct, &QAction::triggered,
            this, &VMainWindow::changeExpandTab);

    // Tab stop width.
    QActionGroup *tabStopWidthAct = new QActionGroup(this);
    QAction *twoSpaceTabAct = new QAction(tr("2 Spaces"), tabStopWidthAct);
    twoSpaceTabAct->setToolTip(tr("Expand Tab to 2 spaces"));
    twoSpaceTabAct->setCheckable(true);
    twoSpaceTabAct->setData(2);
    QAction *fourSpaceTabAct = new QAction(tr("4 Spaces"), tabStopWidthAct);
    fourSpaceTabAct->setToolTip(tr("Expand Tab to 4 spaces"));
    fourSpaceTabAct->setCheckable(true);
    fourSpaceTabAct->setData(4);
    QAction *eightSpaceTabAct = new QAction(tr("8 Spaces"), tabStopWidthAct);
    eightSpaceTabAct->setToolTip(tr("Expand Tab to 8 spaces"));
    eightSpaceTabAct->setCheckable(true);
    eightSpaceTabAct->setData(8);
    connect(tabStopWidthAct, &QActionGroup::triggered,
            this, &VMainWindow::setTabStopWidth);

    // Auto Indent.
    m_autoIndentAct = new QAction(tr("Auto Indent"), this);
    m_autoIndentAct->setToolTip(tr("Indent automatically when inserting a new line"));
    m_autoIndentAct->setCheckable(true);
    connect(m_autoIndentAct, &QAction::triggered,
            this, &VMainWindow::changeAutoIndent);

    // Auto List.
    QAction *autoListAct = new QAction(tr("Auto List"), this);
    autoListAct->setToolTip(tr("Continue the list automatically when inserting a new line"));
    autoListAct->setCheckable(true);
    connect(autoListAct, &QAction::triggered,
            this, &VMainWindow::changeAutoList);

    // Highlight current cursor line.
    QAction *cursorLineAct = new QAction(tr("Highlight Cursor Line"), this);
    cursorLineAct->setToolTip(tr("Highlight current cursor line"));
    cursorLineAct->setCheckable(true);
    connect(cursorLineAct, &QAction::triggered,
            this, &VMainWindow::changeHighlightCursorLine);

    // Highlight selected word.
    QAction *selectedWordAct = new QAction(tr("Highlight Selected Words"), this);
    selectedWordAct->setToolTip(tr("Highlight all occurences of selected words"));
    selectedWordAct->setCheckable(true);
    connect(selectedWordAct, &QAction::triggered,
            this, &VMainWindow::changeHighlightSelectedWord);

    // Highlight trailing space.
    QAction *trailingSapceAct = new QAction(tr("Highlight Trailing Spaces"), this);
    trailingSapceAct->setToolTip(tr("Highlight all the spaces at the end of a line"));
    trailingSapceAct->setCheckable(true);
    connect(trailingSapceAct, &QAction::triggered,
            this, &VMainWindow::changeHighlightTrailingSapce);

    // Highlight tab.
    QAction *tabAct = new QAction(tr("Highlight Tabs"), this);
    tabAct->setToolTip(tr("Highlight all the tabs"));
    tabAct->setCheckable(true);
    connect(tabAct, &QAction::triggered,
            this, [](bool p_checked) {
                g_config->setEnableTabHighlight(p_checked);
            });

    QMenu *findReplaceMenu = editMenu->addMenu(tr("Find/Replace"));
    findReplaceMenu->setToolTipsVisible(true);
    findReplaceMenu->addAction(m_findReplaceAct);
    findReplaceMenu->addAction(advFindAct);
    findReplaceMenu->addSeparator();
    findReplaceMenu->addAction(m_findNextAct);
    findReplaceMenu->addAction(m_findPreviousAct);
    findReplaceMenu->addAction(m_replaceAct);
    findReplaceMenu->addAction(m_replaceFindAct);
    findReplaceMenu->addAction(m_replaceAllAct);
    findReplaceMenu->addSeparator();
    findReplaceMenu->addAction(searchedWordAct);
    searchedWordAct->setChecked(g_config->getHighlightSearchedWord());

    m_findReplaceAct->setEnabled(false);
    m_findNextAct->setEnabled(false);
    m_findPreviousAct->setEnabled(false);
    m_replaceAct->setEnabled(false);
    m_replaceFindAct->setEnabled(false);
    m_replaceAllAct->setEnabled(false);

    editMenu->addSeparator();
    editMenu->addAction(expandTabAct);
    if (g_config->getIsExpandTab()) {
        expandTabAct->setChecked(true);
    } else {
        expandTabAct->setChecked(false);
    }

    QMenu *tabStopWidthMenu = editMenu->addMenu(tr("Tab Stop Width"));
    tabStopWidthMenu->setToolTipsVisible(true);
    tabStopWidthMenu->addAction(twoSpaceTabAct);
    tabStopWidthMenu->addAction(fourSpaceTabAct);
    tabStopWidthMenu->addAction(eightSpaceTabAct);
    int tabStopWidth = g_config->getTabStopWidth();
    switch (tabStopWidth) {
    case 2:
        twoSpaceTabAct->setChecked(true);
        break;
    case 4:
        fourSpaceTabAct->setChecked(true);
        break;
    case 8:
        eightSpaceTabAct->setChecked(true);
        break;
    default:
        qWarning() << "unsupported tab stop width" << tabStopWidth <<  "in config";
    }

    editMenu->addAction(m_autoIndentAct);
    m_autoIndentAct->setChecked(g_config->getAutoIndent());

    editMenu->addAction(autoListAct);
    if (g_config->getAutoList()) {
        // Let the trigger handler to trigger m_autoIndentAct, too.
        autoListAct->trigger();
    }
    Q_ASSERT(!(autoListAct->isChecked() && !m_autoIndentAct->isChecked()));

    editMenu->addSeparator();

    initEditorStyleMenu(editMenu);

    initEditorBackgroundMenu(editMenu);

    initEditorLineNumberMenu(editMenu);

    editMenu->addAction(cursorLineAct);
    cursorLineAct->setChecked(g_config->getHighlightCursorLine());

    editMenu->addAction(selectedWordAct);
    selectedWordAct->setChecked(g_config->getHighlightSelectedWord());

    editMenu->addAction(trailingSapceAct);
    trailingSapceAct->setChecked(g_config->getEnableTrailingSpaceHighlight());

    editMenu->addAction(tabAct);
    tabAct->setChecked(g_config->getEnableTabHighlight());

    initAutoScrollCursorLineMenu(editMenu);

    // Smart table.
    QAction *smartTableAct = new QAction(tr("Smart Table"), this);
    smartTableAct->setToolTip(tr("Format table automatically"));
    smartTableAct->setCheckable(true);
    connect(smartTableAct, &QAction::triggered,
            this, [](bool p_checked) {
                g_config->setEnableSmartTable(p_checked);
            });
    editMenu->addAction(smartTableAct);
    smartTableAct->setChecked(g_config->getEnableSmartTable());
}

void VMainWindow::initDockWindows()
{
    setTabPosition(Qt::LeftDockWidgetArea, QTabWidget::West);
    setTabPosition(Qt::RightDockWidgetArea, QTabWidget::East);
    setTabPosition(Qt::TopDockWidgetArea, QTabWidget::North);
    setTabPosition(Qt::BottomDockWidgetArea, QTabWidget::North);

    setDockNestingEnabled(true);

    initToolsDock();
    initSearchDock();
}

void VMainWindow::initToolsDock()
{
    m_toolDock = new QDockWidget(tr("Tools"), this);
    m_toolDock->setObjectName("ToolsDock");
    m_toolDock->setAllowedAreas(Qt::AllDockWidgetAreas);

    // Outline tree.
    outline = new VOutline(this);
    connect(m_editArea, &VEditArea::outlineChanged,
            outline, &VOutline::updateOutline);
    connect(m_editArea, &VEditArea::currentHeaderChanged,
            outline, &VOutline::updateCurrentHeader);
    connect(outline, &VOutline::outlineItemActivated,
            m_editArea, &VEditArea::scrollToHeader);

    // Snippets.
    m_snippetList = new VSnippetList(this);

    // Cart.
    m_cart = new VCart(this);

    m_toolBox = new VToolBox(this);
    m_toolBox->addItem(outline,
                       ":/resources/icons/outline.svg",
                       tr("Outline"));
    m_toolBox->addItem(m_snippetList,
                       ":/resources/icons/snippets.svg",
                       tr("Snippets"));
    m_toolBox->addItem(m_cart,
                       ":/resources/icons/cart.svg",
                       tr("Cart"));

    m_toolDock->setWidget(m_toolBox);
    addDockWidget(Qt::RightDockWidgetArea, m_toolDock);

    QAction *toggleAct = m_toolDock->toggleViewAction();
    toggleAct->setToolTip(tr("Toggle the tools dock widget"));
    VUtils::fixTextWithCaptainShortcut(toggleAct, "ToolsDock");

    m_viewMenu->addAction(toggleAct);
}

void VMainWindow::initSearchDock()
{
    m_searchDock = new QDockWidget(tr("Search"), this);
    m_searchDock->setObjectName("SearchDock");
    m_searchDock->setAllowedAreas(Qt::AllDockWidgetAreas);

    m_searcher = new VSearcher(this);

    m_searchDock->setWidget(m_searcher);

    addDockWidget(Qt::RightDockWidgetArea, m_searchDock);

    QAction *toggleAct = m_searchDock->toggleViewAction();
    toggleAct->setToolTip(tr("Toggle the search dock widget"));
    VUtils::fixTextWithCaptainShortcut(toggleAct, "SearchDock");

    m_viewMenu->addAction(toggleAct);
}

void VMainWindow::importNoteFromFile()
{
    static QString lastPath = QDir::homePath();
    QStringList files = QFileDialog::getOpenFileNames(this,
                                                      tr("Select Files To Create Notes"),
                                                      lastPath);
    if (files.isEmpty()) {
        return;
    }

    // Update lastPath
    lastPath = QFileInfo(files[0]).path();

    QString msg;
    if (!m_fileList->importFiles(files, &msg)) {
        VUtils::showMessage(QMessageBox::Warning,
                            tr("Warning"),
                            tr("Fail to create notes for all the files."),
                            msg,
                            QMessageBox::Ok,
                            QMessageBox::Ok,
                            this);
    } else {
        int cnt = files.size();
        showStatusMessage(tr("%1 %2 created from external files")
                            .arg(cnt)
                            .arg(cnt > 1 ? tr("notes") : tr("note")));
    }
}

void VMainWindow::changeMarkdownConverter(QAction *action)
{
    if (!action) {
        return;
    }

    MarkdownConverterType type = (MarkdownConverterType)action->data().toInt();

    g_config->setMarkdownConverterType(type);
}

void VMainWindow::aboutMessage()
{
    QString info = tr("VNote");
    info += "<br/>";
    info += tr("Version: %1").arg(VConfigManager::c_version);
    info += "<br/>";
    info += tr("Author: Le Tan (tamlok)");
    info += "<br/><br/>";
    info += tr("VNote is a free and open source note-taking application that knows programmers and Markdown better.");
    info += "<br/><br/>";
    info += tr("Please visit <a href=\"https://tamlok.github.io/vnote\">VNote</a> for more information.");
    QMessageBox::about(this, tr("About VNote"), info);
}

void VMainWindow::changeExpandTab(bool checked)
{
    g_config->setIsExpandTab(checked);
}

void VMainWindow::enableMermaid(bool p_checked)
{
    g_config->setEnableMermaid(p_checked);
    VUtils::promptForReopen(this);
}

void VMainWindow::enableMathjax(bool p_checked)
{
    g_config->setEnableMathjax(p_checked);
    VUtils::promptForReopen(this);
}

void VMainWindow::changeHighlightCursorLine(bool p_checked)
{
    g_config->setHighlightCursorLine(p_checked);
}

void VMainWindow::changeHighlightSelectedWord(bool p_checked)
{
    g_config->setHighlightSelectedWord(p_checked);
}

void VMainWindow::changeHighlightSearchedWord(bool p_checked)
{
    g_config->setHighlightSearchedWord(p_checked);
}

void VMainWindow::changeHighlightTrailingSapce(bool p_checked)
{
    g_config->setEnableTrailingSapceHighlight(p_checked);
}

void VMainWindow::setTabStopWidth(QAction *action)
{
    if (!action) {
        return;
    }
    g_config->setTabStopWidth(action->data().toInt());
}

void VMainWindow::setEditorBackgroundColor(QAction *action)
{
    if (!action) {
        return;
    }

    g_config->setCurBackgroundColor(action->data().toString());
}

void VMainWindow::initConverterMenu(QMenu *p_menu)
{
    QMenu *converterMenu = p_menu->addMenu(tr("&Renderer"));
    converterMenu->setToolTipsVisible(true);

    QActionGroup *converterAct = new QActionGroup(this);
    QAction *markedAct = new QAction(tr("Marked"), converterAct);
    markedAct->setToolTip(tr("Use Marked to convert Markdown to HTML (re-open current tabs to make it work)"));
    markedAct->setCheckable(true);
    markedAct->setData(int(MarkdownConverterType::Marked));

    QAction *hoedownAct = new QAction(tr("Hoedown"), converterAct);
    hoedownAct->setToolTip(tr("Use Hoedown to convert Markdown to HTML (re-open current tabs to make it work)"));
    hoedownAct->setCheckable(true);
    hoedownAct->setData(int(MarkdownConverterType::Hoedown));

    QAction *markdownitAct = new QAction(tr("Markdown-it"), converterAct);
    markdownitAct->setToolTip(tr("Use Markdown-it to convert Markdown to HTML (re-open current tabs to make it work)"));
    markdownitAct->setCheckable(true);
    markdownitAct->setData(int(MarkdownConverterType::MarkdownIt));

    QAction *showdownAct = new QAction(tr("Showdown"), converterAct);
    showdownAct->setToolTip(tr("Use Showdown to convert Markdown to HTML (re-open current tabs to make it work)"));
    showdownAct->setCheckable(true);
    showdownAct->setData(int(MarkdownConverterType::Showdown));

    connect(converterAct, &QActionGroup::triggered,
            this, &VMainWindow::changeMarkdownConverter);
    converterMenu->addAction(hoedownAct);
    converterMenu->addAction(markedAct);
    converterMenu->addAction(markdownitAct);
    converterMenu->addAction(showdownAct);

    MarkdownConverterType converterType = g_config->getMdConverterType();
    switch (converterType) {
    case MarkdownConverterType::Marked:
        markedAct->setChecked(true);
        break;

    case MarkdownConverterType::Hoedown:
        hoedownAct->setChecked(true);
        break;

    case MarkdownConverterType::MarkdownIt:
        markdownitAct->setChecked(true);
        break;

    case MarkdownConverterType::Showdown:
        showdownAct->setChecked(true);
        break;

    default:
        Q_ASSERT(false);
    }
}

void VMainWindow::initMarkdownitOptionMenu(QMenu *p_menu)
{
    QMenu *optMenu = p_menu->addMenu(tr("Markdown-it Options"));
    optMenu->setToolTipsVisible(true);

    const MarkdownitOption &opt = g_config->getMarkdownitOption();

    QAction *htmlAct = new QAction(tr("HTML"), this);
    htmlAct->setToolTip(tr("Enable HTML tags in source (re-open current tabs to make it work)"));
    htmlAct->setCheckable(true);
    htmlAct->setChecked(opt.m_html);
    connect(htmlAct, &QAction::triggered,
            this, [](bool p_checked) {
                MarkdownitOption opt = g_config->getMarkdownitOption();
                opt.m_html = p_checked;
                g_config->setMarkdownitOption(opt);
            });

    QAction *breaksAct = new QAction(tr("Line Break"), this);
    breaksAct->setToolTip(tr("Convert '\\n' in paragraphs into line break (re-open current tabs to make it work)"));
    breaksAct->setCheckable(true);
    breaksAct->setChecked(opt.m_breaks);
    connect(breaksAct, &QAction::triggered,
            this, [](bool p_checked) {
                MarkdownitOption opt = g_config->getMarkdownitOption();
                opt.m_breaks = p_checked;
                g_config->setMarkdownitOption(opt);
            });

    QAction *linkifyAct = new QAction(tr("Linkify"), this);
    linkifyAct->setToolTip(tr("Convert URL-like text into links (re-open current tabs to make it work)"));
    linkifyAct->setCheckable(true);
    linkifyAct->setChecked(opt.m_linkify);
    connect(linkifyAct, &QAction::triggered,
            this, [](bool p_checked) {
                MarkdownitOption opt = g_config->getMarkdownitOption();
                opt.m_linkify = p_checked;
                g_config->setMarkdownitOption(opt);
            });

    QAction *supAct = new QAction(tr("Superscript"), this);
    supAct->setToolTip(tr("Enable superscript like ^vnote^ (re-open current tabs to make it work)"));
    supAct->setCheckable(true);
    supAct->setChecked(opt.m_sup);
    connect(supAct, &QAction::triggered,
            this, [](bool p_checked) {
                MarkdownitOption opt = g_config->getMarkdownitOption();
                opt.m_sup = p_checked;
                g_config->setMarkdownitOption(opt);
            });

    QAction *subAct = new QAction(tr("Subscript"), this);
    subAct->setToolTip(tr("Enable subscript like ~vnote~ (re-open current tabs to make it work)"));
    subAct->setCheckable(true);
    subAct->setChecked(opt.m_sub);
    connect(subAct, &QAction::triggered,
            this, [](bool p_checked) {
                MarkdownitOption opt = g_config->getMarkdownitOption();
                opt.m_sub = p_checked;
                g_config->setMarkdownitOption(opt);
            });

    QAction *metadataAct = new QAction(tr("Metadata Aware"), this);
    metadataAct->setToolTip(tr("Be aware of metadata in YAML format (re-open current tabs to make it work)"));
    metadataAct->setCheckable(true);
    metadataAct->setChecked(opt.m_metadata);
    connect(metadataAct, &QAction::triggered,
            this, [](bool p_checked) {
                MarkdownitOption opt = g_config->getMarkdownitOption();
                opt.m_metadata = p_checked;
                g_config->setMarkdownitOption(opt);
            });

    QAction *emojiAct = new QAction(tr("Emoji"), this);
    emojiAct->setToolTip(tr("Enable emoji and emoticon (re-open current tabs to make it work)"));
    emojiAct->setCheckable(true);
    emojiAct->setChecked(opt.m_emoji);
    connect(emojiAct, &QAction::triggered,
            this, [](bool p_checked) {
                MarkdownitOption opt = g_config->getMarkdownitOption();
                opt.m_emoji = p_checked;
                g_config->setMarkdownitOption(opt);
            });

    optMenu->addAction(htmlAct);
    optMenu->addAction(breaksAct);
    optMenu->addAction(linkifyAct);
    optMenu->addAction(supAct);
    optMenu->addAction(subAct);
    optMenu->addAction(metadataAct);
    optMenu->addAction(emojiAct);
}

void VMainWindow::initMarkdownExtensionMenu(QMenu *p_menu)
{
    QMenu *optMenu = p_menu->addMenu(tr("Extensions"));
    optMenu->setToolTipsVisible(true);

    QAction *mermaidAct = new QAction(tr("&Mermaid"), optMenu);
    mermaidAct->setToolTip(tr("Enable Mermaid for graph and diagram (re-open current tabs to make it work)"));
    mermaidAct->setCheckable(true);
    mermaidAct->setChecked(g_config->getEnableMermaid());
    connect(mermaidAct, &QAction::triggered,
            this, &VMainWindow::enableMermaid);
    optMenu->addAction(mermaidAct);

    QAction *flowchartAct = new QAction(tr("&Flowchart.js"), optMenu);
    flowchartAct->setToolTip(tr("Enable Flowchart.js for flowchart diagram (re-open current tabs to make it work)"));
    flowchartAct->setCheckable(true);
    flowchartAct->setChecked(g_config->getEnableFlowchart());
    connect(flowchartAct, &QAction::triggered,
            this, [this](bool p_enabled){
                g_config->setEnableFlowchart(p_enabled);
                VUtils::promptForReopen(this);
            });
    optMenu->addAction(flowchartAct);

    QAction *mathjaxAct = new QAction(tr("Math&Jax"), optMenu);
    mathjaxAct->setToolTip(tr("Enable MathJax for math support in Markdown (re-open current tabs to make it work)"));
    mathjaxAct->setCheckable(true);
    mathjaxAct->setChecked(g_config->getEnableMathjax());
    connect(mathjaxAct, &QAction::triggered,
            this, &VMainWindow::enableMathjax);
    optMenu->addAction(mathjaxAct);

    QAction *wavedromAct = new QAction(tr("&WaveDrom"), optMenu);
    wavedromAct->setToolTip(tr("Enable WaveDrom for digital timing diagram (re-open current tabs to make it work)"));
    wavedromAct->setCheckable(true);
    wavedromAct->setChecked(g_config->getEnableWavedrom());
    connect(wavedromAct, &QAction::triggered,
            this, [this](bool p_enabled){
                g_config->setEnableWavedrom(p_enabled);
                VUtils::promptForReopen(this);
            });
    optMenu->addAction(wavedromAct);
}

void VMainWindow::initRenderBackgroundMenu(QMenu *menu)
{
    QActionGroup *renderBackgroundAct = new QActionGroup(this);
    connect(renderBackgroundAct, &QActionGroup::triggered,
            this, &VMainWindow::setRenderBackgroundColor);

    QMenu *renderBgMenu = menu->addMenu(tr("&Rendering Background"));
    renderBgMenu->setToolTipsVisible(true);
    const QString &curBgColor = g_config->getCurRenderBackgroundColor();
    QAction *tmpAct = new QAction(tr("System"), renderBackgroundAct);
    tmpAct->setToolTip(tr("Use system's background color configuration for Markdown rendering"));
    tmpAct->setCheckable(true);
    tmpAct->setData("System");
    if (curBgColor == "System") {
        tmpAct->setChecked(true);
    }

    renderBgMenu->addAction(tmpAct);

    tmpAct = new QAction(tr("Transparent"), renderBackgroundAct);
    tmpAct->setToolTip(tr("Use a transparent background for Markdown rendering"));
    tmpAct->setCheckable(true);
    tmpAct->setData("Transparent");
    if (curBgColor == "Transparent") {
        tmpAct->setChecked(true);
    }

    renderBgMenu->addAction(tmpAct);

    const QVector<VColor> &bgColors = g_config->getCustomColors();
    for (int i = 0; i < bgColors.size(); ++i) {
        tmpAct = new QAction(bgColors[i].m_name, renderBackgroundAct);
        tmpAct->setToolTip(tr("Set as the background color for Markdown rendering "
                              "(re-open current tabs to make it work)"));
        tmpAct->setCheckable(true);
        tmpAct->setData(bgColors[i].m_name);

#if !defined(Q_OS_MACOS) && !defined(Q_OS_MAC)
        QColor color(bgColors[i].m_color);
        QPixmap pixmap(COLOR_PIXMAP_ICON_SIZE, COLOR_PIXMAP_ICON_SIZE);
        pixmap.fill(color);
        tmpAct->setIcon(QIcon(pixmap));
#endif

        if (curBgColor == bgColors[i].m_name) {
            tmpAct->setChecked(true);
        }

        renderBgMenu->addAction(tmpAct);
    }
}

void VMainWindow::initRenderStyleMenu(QMenu *p_menu)
{
    QMenu *styleMenu = p_menu->addMenu(tr("Rendering &Style"));
    styleMenu->setToolTipsVisible(true);

    QAction *addAct = newAction(VIconUtils::menuIcon(":/resources/icons/add_style.svg"),
                                tr("Add Style"),
                                styleMenu);
    addAct->setToolTip(tr("Add custom style of read mode"));
    connect(addAct, &QAction::triggered,
            this, [this]() {
                VTipsDialog dialog(VUtils::getDocFile("tips_add_style.md"),
                                   tr("Add Style"),
                                   []() {
                                       QUrl url = QUrl::fromLocalFile(g_config->getStyleConfigFolder());
                                       QDesktopServices::openUrl(url);
                                   },
                                   this);
                dialog.exec();
            });

    styleMenu->addAction(addAct);

    QActionGroup *ag = new QActionGroup(this);
    connect(ag, &QActionGroup::triggered,
            this, [](QAction *p_action) {
                QString data = p_action->data().toString();
                g_config->setCssStyle(data);
                g_vnote->updateTemplate();
            });

    QList<QString> styles = g_config->getCssStyles();
    QString curStyle = g_config->getCssStyle();
    for (auto const &style : styles) {
        QAction *act = new QAction(style, ag);
        act->setToolTip(tr("Set as the CSS style for Markdown rendering "
                           "(re-open current tabs to make it work)"));
        act->setCheckable(true);
        act->setData(style);

        // Add it to the menu.
        styleMenu->addAction(act);

        if (curStyle == style) {
            act->setChecked(true);
        }
    }
}

void VMainWindow::initCodeBlockStyleMenu(QMenu *p_menu)
{
    QMenu *styleMenu = p_menu->addMenu(tr("Code Block Style"));
    styleMenu->setToolTipsVisible(true);

    QAction *addAct = newAction(VIconUtils::menuIcon(":/resources/icons/add_style.svg"),
                                tr("Add Style"),
                                styleMenu);
    addAct->setToolTip(tr("Add custom style of code block in read mode"));
    connect(addAct, &QAction::triggered,
            this, [this]() {
                VTipsDialog dialog(VUtils::getDocFile("tips_add_style.md"),
                                   tr("Add Style"),
                                   []() {
                                       QUrl url = QUrl::fromLocalFile(g_config->getCodeBlockStyleConfigFolder());
                                       QDesktopServices::openUrl(url);
                                   },
                                   this);
                dialog.exec();
            });

    styleMenu->addAction(addAct);

    QActionGroup *ag = new QActionGroup(this);
    connect(ag, &QActionGroup::triggered,
            this, [](QAction *p_action) {
                QString data = p_action->data().toString();
                g_config->setCodeBlockCssStyle(data);
                g_vnote->updateTemplate();
            });

    QList<QString> styles = g_config->getCodeBlockCssStyles();
    QString curStyle = g_config->getCodeBlockCssStyle();
    for (auto const &style : styles) {
        QAction *act = new QAction(style, ag);
        act->setToolTip(tr("Set as the code block CSS style for Markdown rendering "
                           "(re-open current tabs to make it work)"));
        act->setCheckable(true);
        act->setData(style);

        // Add it to the menu.
        styleMenu->addAction(act);

        if (curStyle == style) {
            act->setChecked(true);
        }
    }
}

void VMainWindow::initEditorBackgroundMenu(QMenu *menu)
{
    QMenu *backgroundColorMenu = menu->addMenu(tr("&Background Color"));
    backgroundColorMenu->setToolTipsVisible(true);

    QActionGroup *backgroundColorAct = new QActionGroup(this);
    connect(backgroundColorAct, &QActionGroup::triggered,
            this, &VMainWindow::setEditorBackgroundColor);

    // System background color
    const QString &curBgColor = g_config->getCurBackgroundColor();
    QAction *tmpAct = new QAction(tr("System"), backgroundColorAct);
    tmpAct->setToolTip(tr("Use system's background color configuration for editor"));
    tmpAct->setCheckable(true);
    tmpAct->setData("System");
    if (curBgColor == "System") {
        tmpAct->setChecked(true);
    }
    backgroundColorMenu->addAction(tmpAct);
    const QVector<VColor> &bgColors = g_config->getCustomColors();
    for (int i = 0; i < bgColors.size(); ++i) {
        tmpAct = new QAction(bgColors[i].m_name, backgroundColorAct);
        tmpAct->setToolTip(tr("Set as the background color for editor (re-open current tabs to make it work)"));
        tmpAct->setCheckable(true);
        tmpAct->setData(bgColors[i].m_name);

#if !defined(Q_OS_MACOS) && !defined(Q_OS_MAC)
        QColor color(bgColors[i].m_color);
        QPixmap pixmap(COLOR_PIXMAP_ICON_SIZE, COLOR_PIXMAP_ICON_SIZE);
        pixmap.fill(color);
        tmpAct->setIcon(QIcon(pixmap));
#endif

        if (curBgColor == bgColors[i].m_name) {
            tmpAct->setChecked(true);
        }

        backgroundColorMenu->addAction(tmpAct);
    }
}

void VMainWindow::initEditorLineNumberMenu(QMenu *p_menu)
{
    QMenu *lineNumMenu = p_menu->addMenu(tr("Line Number"));
    lineNumMenu->setToolTipsVisible(true);

    QActionGroup *lineNumAct = new QActionGroup(lineNumMenu);
    connect(lineNumAct, &QActionGroup::triggered,
            this, [this](QAction *p_action){
                if (!p_action) {
                    return;
                }

                g_config->setEditorLineNumber(p_action->data().toInt());
                emit editorConfigUpdated();
            });

    int lineNumberMode = g_config->getEditorLineNumber();

    QAction *act = lineNumAct->addAction(tr("None"));
    act->setToolTip(tr("Do not display line number in edit mode"));
    act->setCheckable(true);
    act->setData(0);
    lineNumMenu->addAction(act);
    if (lineNumberMode == 0) {
        act->setChecked(true);
    }

    act = lineNumAct->addAction(tr("Absolute"));
    act->setToolTip(tr("Display absolute line number in edit mode"));
    act->setCheckable(true);
    act->setData(1);
    lineNumMenu->addAction(act);
    if (lineNumberMode == 1) {
        act->setChecked(true);
    }

    act = lineNumAct->addAction(tr("Relative"));
    act->setToolTip(tr("Display line number relative to current cursor line in edit mode"));
    act->setCheckable(true);
    act->setData(2);
    lineNumMenu->addAction(act);
    if (lineNumberMode == 2) {
        act->setChecked(true);
    }

    act = lineNumAct->addAction(tr("CodeBlock"));
    act->setToolTip(tr("Display line number in code block in edit mode (for Markdown only)"));
    act->setCheckable(true);
    act->setData(3);
    lineNumMenu->addAction(act);
    if (lineNumberMode == 3) {
        act->setChecked(true);
    }
}

void VMainWindow::initEditorStyleMenu(QMenu *p_menu)
{
    QMenu *styleMenu = p_menu->addMenu(tr("Editor &Style"));
    styleMenu->setToolTipsVisible(true);

    QAction *addAct = newAction(VIconUtils::menuIcon(":/resources/icons/add_style.svg"),
                                tr("Add Style"),
                                styleMenu);
    addAct->setToolTip(tr("Add custom style of editor"));
    connect(addAct, &QAction::triggered,
            this, [this]() {
                VTipsDialog dialog(VUtils::getDocFile("tips_add_style.md"),
                                   tr("Add Style"),
                                   []() {
                                       QUrl url = QUrl::fromLocalFile(g_config->getStyleConfigFolder());
                                       QDesktopServices::openUrl(url);
                                   },
                                   this);
                dialog.exec();
            });

    styleMenu->addAction(addAct);

    QActionGroup *ag = new QActionGroup(this);
    connect(ag, &QActionGroup::triggered,
            this, [](QAction *p_action) {
                QString data = p_action->data().toString();
                g_config->setEditorStyle(data);
            });

    QList<QString> styles = g_config->getEditorStyles();
    QString style = g_config->getEditorStyle();
    for (auto const &item : styles) {
        QAction *act = new QAction(item, ag);
        act->setToolTip(tr("Set as the editor style (re-open current tabs to make it work)"));
        act->setCheckable(true);
        act->setData(item);

        // Add it to the menu.
        styleMenu->addAction(act);

        if (style == item) {
            act->setChecked(true);
        }
    }
}

void VMainWindow::initAutoScrollCursorLineMenu(QMenu *p_menu)
{
    QMenu *subMenu = p_menu->addMenu(tr("Auto Scroll Cursor Line"));
    subMenu->setToolTipsVisible(true);

    QActionGroup *ag = new QActionGroup(this);
    connect(ag, &QActionGroup::triggered,
            this, [](QAction *p_action) {
                g_config->setAutoScrollCursorLine(p_action->data().toInt());
            });

    int mode = g_config->getAutoScrollCursorLine();

    int data = AutoScrollDisabled;
    QAction *act = new QAction(tr("Disabled"), ag);
    act->setCheckable(true);
    act->setData(data);
    subMenu->addAction(act);
    if (mode == data) {
        act->setChecked(true);
    }

    data = AutoScrollEndOfDoc;
    act = new QAction(tr("End Of Document"), ag);
    act->setToolTip(tr("Scroll cursor line into the center when it locates at the end of document"));
    act->setCheckable(true);
    act->setData(data);
    subMenu->addAction(act);
    if (mode == data) {
        act->setChecked(true);
    }

    data = AutoScrollAlways;
    act = new QAction(tr("Always"), ag);
    act->setToolTip(tr("Always scroll cursor line into the center"));
    act->setCheckable(true);
    act->setData(data);
    subMenu->addAction(act);
    if (mode == data) {
        act->setChecked(true);
    }
}

void VMainWindow::setRenderBackgroundColor(QAction *action)
{
    if (!action) {
        return;
    }

    g_config->setCurRenderBackgroundColor(action->data().toString());
    vnote->updateTemplate();
}

void VMainWindow::updateActionsStateFromTab(const VEditTab *p_tab)
{
    const VFile *file = p_tab ? p_tab->getFile() : NULL;
    bool editMode = p_tab ? p_tab->isEditMode() : false;
    bool systemFile = file
                      && file->getType() == FileType::Orphan
                      && dynamic_cast<const VOrphanFile *>(file)->isSystemFile();

    m_printAct->setEnabled(file && file->getDocType() == DocType::Markdown);

    updateEditReadAct(p_tab);

    saveNoteAct->setEnabled(file && editMode && file->isModifiable());
    deleteNoteAct->setEnabled(file && file->getType() == FileType::Note);
    noteInfoAct->setEnabled(file && !systemFile);

    m_attachmentBtn->setEnabled(file && file->getType() == FileType::Note);

    m_headingBtn->setEnabled(file && editMode);

    setActionsEnabled(m_editToolBar, file && editMode);

    // Handle heading sequence act independently.
    m_headingSequenceAct->setEnabled(editMode
                                     && file->isModifiable()
                                     && isHeadingSequenceApplicable());
    const VMdTab *mdTab = dynamic_cast<const VMdTab *>(p_tab);
    m_headingSequenceAct->setChecked(mdTab
                                     && editMode
                                     && file->isModifiable()
                                     && mdTab->isHeadingSequenceEnabled());

    // Find/Replace
    m_findReplaceAct->setEnabled(file);
    m_findNextAct->setEnabled(file);
    m_findPreviousAct->setEnabled(file);
    m_replaceAct->setEnabled(file && editMode);
    m_replaceFindAct->setEnabled(file && editMode);
    m_replaceAllAct->setEnabled(file && editMode);

    if (!file) {
        m_findReplaceDialog->closeDialog();
    }

    m_updateTimer->start();
}

void VMainWindow::handleAreaTabStatusUpdated(const VEditTabInfo &p_info)
{
    if (m_curTab != p_info.m_editTab) {
        if (m_curTab) {
            if (m_vimCmd->isVisible()) {
                m_curTab->handleVimCmdCommandCancelled();
            }

            // Disconnect the trigger signal from edit tab.
            disconnect((VEditTab *)m_curTab, 0, m_vimCmd, 0);
        }

        m_curTab = p_info.m_editTab;
        if (m_curTab) {
            connect((VEditTab *)m_curTab, &VEditTab::triggerVimCmd,
                    m_vimCmd, &VVimCmdLineEdit::reset);
        }

        m_vimCmd->hide();
    }

    if (m_curTab) {
        m_curFile = m_curTab->getFile();
    } else {
        m_curFile = NULL;
    }

    if (p_info.m_type == VEditTabInfo::InfoType::All) {
        updateActionsStateFromTab(m_curTab);

        m_attachmentList->setFile(dynamic_cast<VNoteFile *>(m_curFile.data()));

        if (m_syncNoteListToCurrentTab && g_config->getSyncNoteListToTab()) {
            locateFile(m_curFile, false, false);
        }

        QString title;
        if (m_curFile) {
            m_findReplaceDialog->updateState(m_curFile->getDocType(),
                                             m_curTab->isEditMode());

            if (m_curFile->getType() == FileType::Note) {
                const VNoteFile *tmpFile = dynamic_cast<const VNoteFile *>((VFile *)m_curFile);
                title = QString("[%1] %2").arg(tmpFile->getNotebookName()).arg(tmpFile->fetchPath());
            } else {
                title = QString("%1").arg(m_curFile->fetchPath());
            }

            if (!m_curFile->isModifiable()) {
                title.append('#');
            }

            if (m_curTab->isModified()) {
                title.append('*');
            }
        }

        updateWindowTitle(title);
    }

    updateStatusInfo(p_info);
}

void VMainWindow::changePanelView(PanelViewState p_state)
{
    switch (p_state) {
    case PanelViewState::ExpandMode:
        m_mainSplitter->widget(0)->hide();
        m_mainSplitter->widget(1)->show();
        break;

    case PanelViewState::HorizontalMode:
    case PanelViewState::VerticalMode:
        m_mainSplitter->widget(0)->show();
        m_mainSplitter->widget(1)->show();
        break;

    default:
        Q_ASSERT(false);
        break;
    }

    g_config->setPanelViewState((int)p_state);

    expandViewAct->setChecked(p_state == PanelViewState::ExpandMode);
}

void VMainWindow::updateWindowTitle(const QString &str)
{
    QString title = "VNote";
    if (!str.isEmpty()) {
        title = title + " - " + str;
    }
    setWindowTitle(title);
}

void VMainWindow::curEditFileInfo()
{
    Q_ASSERT(m_curFile);

    if (m_curFile->getType() == FileType::Note) {
        VNoteFile *file = dynamic_cast<VNoteFile *>((VFile *)m_curFile);
        Q_ASSERT(file);
        m_fileList->fileInfo(file);
    } else if (m_curFile->getType() == FileType::Orphan) {
        VOrphanFile *file = dynamic_cast<VOrphanFile *>((VFile *)m_curFile);
        Q_ASSERT(file);
        if (!file->isSystemFile()) {
            editOrphanFileInfo(m_curFile);
        }
    }
}

void VMainWindow::deleteCurNote()
{
    if (!m_curFile || m_curFile->getType() != FileType::Note) {
        return;
    }

    VNoteFile *file = dynamic_cast<VNoteFile *>((VFile *)m_curFile);
    m_fileList->deleteFile(file);
}

void VMainWindow::closeEvent(QCloseEvent *event)
{
    bool isExit = m_requestQuit || !g_config->getMinimizeToStystemTray();
    m_requestQuit = false;

    m_captain->exitCaptainMode();

#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
    // Do not support minimized to tray on macOS.
    isExit = true;
#endif

    if (!isExit && g_config->getMinimizeToStystemTray() == -1) {
        // Not initialized yet. Prompt for user.
        int ret = VUtils::showMessage(QMessageBox::Information,
                                      tr("Close VNote"),
                                      tr("Do you want to minimize VNote to system tray "
                                         "instead of quitting it when closing VNote?"),
                                      tr("You could change the option in Settings later."),
                                      QMessageBox::Ok | QMessageBox::No | QMessageBox::Cancel,
                                      QMessageBox::Ok,
                                      this);
        if (ret == QMessageBox::Ok) {
            g_config->setMinimizeToSystemTray(1);
        } else if (ret == QMessageBox::No) {
            g_config->setMinimizeToSystemTray(0);
            isExit = true;
        } else {
            event->ignore();
            return;
        }
    }

    if (isVisible()) {
        saveStateAndGeometry();
    }

    if (isExit || !m_trayIcon->isVisible()) {
        // Get all the opened tabs.
        bool saveOpenedNotes = g_config->getStartupPageType() == StartupPageType::ContinueLeftOff;
        QVector<VFileSessionInfo> fileInfos;
        QVector<VEditTabInfo> tabs;
        if (saveOpenedNotes) {
            tabs = m_editArea->getAllTabsInfo();

            fileInfos.reserve(tabs.size());

            for (auto const & tab : tabs) {
                // Skip system file.
                VFile *file = tab.m_editTab->getFile();
                if (file->getType() == FileType::Orphan
                    && dynamic_cast<VOrphanFile *>(file)->isSystemFile()) {
                    continue;
                }

                VFileSessionInfo info = VFileSessionInfo::fromEditTabInfo(&tab);
                if (tab.m_editTab == m_curTab) {
                    info.setActive(true);
                }

                fileInfos.push_back(info);

                qDebug() << "file session:" << info.m_file << (info.m_mode == OpenFileMode::Edit);
            }
        }

        m_syncNoteListToCurrentTab = false;

        if (!m_editArea->closeAllFiles(false)) {
            // Fail to close all the opened files, cancel closing app.
            event->ignore();
            m_syncNoteListToCurrentTab = true;
            return;
        }

        if (saveOpenedNotes) {
            g_config->setLastOpenedFiles(fileInfos);
        }

        QMainWindow::closeEvent(event);
        qApp->quit();
    } else {
        hide();
        event->ignore();
    }
}

void VMainWindow::saveStateAndGeometry()
{
    g_config->setMainWindowGeometry(saveGeometry());
    g_config->setMainWindowState(saveState());
    g_config->setToolsDockChecked(m_toolDock->isVisible());
    g_config->setSearchDockChecked(m_searchDock->isVisible());
    g_config->setMainSplitterState(m_mainSplitter->saveState());
    g_config->setNotebookSplitterState(m_nbSplitter->saveState());
    m_tagExplorer->saveStateAndGeometry();
    g_config->setNaviBoxCurrentIndex(m_naviBox->currentIndex());
}

void VMainWindow::restoreStateAndGeometry()
{
    const QByteArray geometry = g_config->getMainWindowGeometry();
    if (!geometry.isEmpty()) {
        restoreGeometry(geometry);
    }

    const QByteArray state = g_config->getMainWindowState();
    if (!state.isEmpty()) {
        // restoreState() will restore the state of dock widgets.
        restoreState(state);
    }

    const QByteArray splitterState = g_config->getMainSplitterState();
    if (!splitterState.isEmpty()) {
        m_mainSplitter->restoreState(splitterState);
    }

    const QByteArray nbSplitterState = g_config->getNotebookSplitterState();
    if (!nbSplitterState.isEmpty()) {
        m_nbSplitter->restoreState(nbSplitterState);
    }

    m_naviBox->setCurrentIndex(g_config->getNaviBoxCurrentIndex());
}

void VMainWindow::handleCurrentDirectoryChanged(const VDirectory *p_dir)
{
    newNoteAct->setEnabled(p_dir);
    m_importNoteAct->setEnabled(p_dir);
}

void VMainWindow::handleCurrentNotebookChanged(const VNotebook *p_notebook)
{
    newRootDirAct->setEnabled(p_notebook);
}

void VMainWindow::keyPressEvent(QKeyEvent *event)
{
    int key = event->key();
    Qt::KeyboardModifiers modifiers = event->modifiers();
    if (key == Qt::Key_Escape
        || (key == Qt::Key_BracketLeft
            && modifiers == Qt::ControlModifier)) {
        m_findReplaceDialog->closeDialog();
        event->accept();
        return;
    }
    QMainWindow::keyPressEvent(event);
}

bool VMainWindow::locateFile(VFile *p_file, bool p_focus, bool p_show)
{
    bool ret = false;
    if (!p_file || p_file->getType() != FileType::Note) {
        return ret;
    }

    VNoteFile *file = dynamic_cast<VNoteFile *>(p_file);
    VNotebook *notebook = file->getNotebook();
    if (m_notebookSelector->locateNotebook(notebook)) {
        while (m_dirTree->currentNotebook() != notebook) {
            QCoreApplication::sendPostedEvents();
        }

        VDirectory *dir = file->getDirectory();
        if (m_dirTree->locateDirectory(dir)) {
            while (m_fileList->currentDirectory() != dir) {
                QCoreApplication::sendPostedEvents();
            }

            if (m_fileList->locateFile(file)) {
                ret = true;
                if (p_focus) {
                    m_fileList->setFocus();
                }
            }
        }
    }

    // Open the directory and file panels after location.
    if (ret && p_show) {
        showNotebookPanel();
    }

    return ret;
}

bool VMainWindow::locateDirectory(VDirectory *p_directory)
{
    bool ret = false;
    if (!p_directory) {
        return ret;
    }

    VNotebook *notebook = p_directory->getNotebook();
    if (m_notebookSelector->locateNotebook(notebook)) {
        while (m_dirTree->currentNotebook() != notebook) {
            QCoreApplication::sendPostedEvents();
        }

        if (m_dirTree->locateDirectory(p_directory)) {
            ret = true;
            m_dirTree->setFocus();
        }
    }

    // Open the directory and file panels after location.
    if (ret) {
        showNotebookPanel();
    }

    return ret;
}

bool VMainWindow::locateNotebook(VNotebook *p_notebook)
{
    bool ret = false;
    if (!p_notebook) {
        return ret;
    }

    if (m_notebookSelector->locateNotebook(p_notebook)) {
        ret = true;
        m_dirTree->setFocus();
    }

    // Open the directory and file panels after location.
    if (ret) {
        showNotebookPanel();
    }

    return ret;
}

void VMainWindow::handleFindDialogTextChanged(const QString &p_text, uint /* p_options */)
{
    bool enabled = true;
    if (p_text.isEmpty()) {
        enabled = false;
    }
    m_findNextAct->setEnabled(enabled);
    m_findPreviousAct->setEnabled(enabled);
    m_replaceAct->setEnabled(enabled);
    m_replaceFindAct->setEnabled(enabled);
    m_replaceAllAct->setEnabled(enabled);
}

void VMainWindow::openFindDialog()
{
    m_findReplaceDialog->openDialog(m_editArea->getSelectedText());
}

void VMainWindow::viewSettings()
{
    VSettingsDialog settingsDialog(this);
    if (settingsDialog.exec()) {
        if (settingsDialog.getNeedUpdateEditorFont()) {
            updateFontOfAllTabs();
        }
    }
}

void VMainWindow::closeCurrentFile()
{
    if (m_curFile) {
        m_editArea->closeFile(m_curFile, false);
    }
}

void VMainWindow::changeAutoIndent(bool p_checked)
{
    g_config->setAutoIndent(p_checked);
}

void VMainWindow::changeAutoList(bool p_checked)
{
    g_config->setAutoList(p_checked);
    if (p_checked) {
        if (!m_autoIndentAct->isChecked()) {
            m_autoIndentAct->trigger();
        }
        m_autoIndentAct->setEnabled(false);
    } else {
        m_autoIndentAct->setEnabled(true);
    }
}

void VMainWindow::enableCodeBlockHighlight(bool p_checked)
{
    g_config->setEnableCodeBlockHighlight(p_checked);
}

void VMainWindow::enableImagePreview(bool p_checked)
{
    g_config->setEnablePreviewImages(p_checked);

    emit editorConfigUpdated();
}

void VMainWindow::enableImagePreviewConstraint(bool p_checked)
{
    g_config->setEnablePreviewImageConstraint(p_checked);

    emit editorConfigUpdated();
}

void VMainWindow::enableImageConstraint(bool p_checked)
{
    g_config->setEnableImageConstraint(p_checked);

    vnote->updateTemplate();
}

void VMainWindow::enableImageCaption(bool p_checked)
{
    g_config->setEnableImageCaption(p_checked);
}

void VMainWindow::shortcutsHelp()
{
    QString docFile = VUtils::getDocFile(VNote::c_shortcutsDocFile);
    VFile *file = vnote->getFile(docFile, true);
    m_editArea->openFile(file, OpenFileMode::Read);
}

void VMainWindow::printNote()
{
    if (m_printer
        || !m_curFile
        || m_curFile->getDocType() != DocType::Markdown) {
        return;
    }

    m_printer = new QPrinter();
    QPrintDialog dialog(m_printer, this);
    dialog.setWindowTitle(tr("Print Note"));

    V_ASSERT(m_curTab);

    VMdTab *mdTab = dynamic_cast<VMdTab *>((VEditTab *)m_curTab);
    VWebView *webView = mdTab->getWebViewer();

    V_ASSERT(webView);

    if (webView->hasSelection()) {
        dialog.addEnabledOption(QAbstractPrintDialog::PrintSelection);
    }

    if (dialog.exec() == QDialog::Accepted) {
        webView->page()->print(m_printer, [this](bool p_succ) {
                    qDebug() << "print web page callback" << p_succ;
                    delete m_printer;
                    m_printer = NULL;
                });
    } else {
        delete m_printer;
        m_printer = NULL;
    }
}

QAction *VMainWindow::newAction(const QIcon &p_icon,
                                const QString &p_text,
                                QObject *p_parent)
{
#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
    Q_UNUSED(p_icon);
    return new QAction(p_text, p_parent);
#else
    return new QAction(p_icon, p_text, p_parent);
#endif
}

void VMainWindow::showStatusMessage(const QString &p_msg)
{
    const int timeout = 5000;
    statusBar()->showMessage(p_msg, timeout);
}

void VMainWindow::updateStatusInfo(const VEditTabInfo &p_info)
{
    if (m_curTab) {
        m_tabIndicator->update(p_info);
        m_tabIndicator->show();

        if (m_curTab->isEditMode()) {
            if (p_info.m_type == VEditTabInfo::InfoType::All) {
                m_curTab->requestUpdateVimStatus();
            }
        } else {
            m_vimIndicator->hide();
        }
    } else {
        m_tabIndicator->hide();
        m_vimIndicator->hide();
    }
}

void VMainWindow::handleVimStatusUpdated(const VVim *p_vim)
{
    m_vimIndicator->update(p_vim);
    if (!p_vim || !m_curTab || !m_curTab->isEditMode()) {
        m_vimIndicator->hide();
    } else {
        m_vimIndicator->show();
    }
}

bool VMainWindow::tryOpenInternalFile(const QString &p_filePath)
{
    if (p_filePath.isEmpty()) {
        return false;
    }

    if (QFileInfo::exists(p_filePath)) {
        VFile *file = vnote->getInternalFile(p_filePath);

        if (file) {
            m_editArea->openFile(file, OpenFileMode::Read);
            return true;
        }
    }

    return false;
}

QVector<VFile *> VMainWindow::openFiles(const QStringList &p_files,
                                        bool p_forceOrphan,
                                        OpenFileMode p_mode,
                                        bool p_forceMode,
                                        bool p_oneByOne)
{
    QVector<VFile *> vfiles;
    vfiles.reserve(p_files.size());

    for (int i = 0; i < p_files.size(); ++i) {
        if (!QFileInfo::exists(p_files[i])) {
            qWarning() << "file" << p_files[i] << "does not exist";
            continue;
        }

        VFile *file = vnote->getFile(p_files[i], p_forceOrphan);

        m_editArea->openFile(file, p_mode, p_forceMode);
        vfiles.append(file);

        if (p_oneByOne) {
            QCoreApplication::sendPostedEvents();
        }
    }

    return vfiles;
}

void VMainWindow::editOrphanFileInfo(VFile *p_file)
{
    VOrphanFile *file = dynamic_cast<VOrphanFile *>(p_file);
    Q_ASSERT(file);

    VOrphanFileInfoDialog dialog(file, this);
    if (dialog.exec() == QDialog::Accepted) {
        QString imgFolder = dialog.getImageFolder();
        file->setImageFolder(imgFolder);
    }
}

void VMainWindow::checkSharedMemory()
{
    QStringList files = m_guard->fetchFilesToOpen();
    if (!files.isEmpty()) {
        qDebug() << "shared memory fetch files" << files;
        openFiles(files, false, g_config->getNoteOpenMode(), false, false);

        // Eliminate the signal.
        m_guard->fetchAskedToShow();

        showMainWindow();
    } else if (m_guard->fetchAskedToShow()) {
        qDebug() << "shared memory asked to show up";
        showMainWindow();
    }
}

void VMainWindow::initTrayIcon()
{
    QMenu *menu = new QMenu(this);
    QAction *showMainWindowAct = menu->addAction(tr("Show VNote"));
    connect(showMainWindowAct, &QAction::triggered,
            this, &VMainWindow::showMainWindow);

    QAction *exitAct = menu->addAction(tr("Quit"));
    connect(exitAct, &QAction::triggered,
            this, &VMainWindow::quitApp);

    QIcon sysIcon(":/resources/icons/256x256/vnote.png");

#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
    sysIcon.setIsMask(true);
#endif

    m_trayIcon = new QSystemTrayIcon(sysIcon, this);
    m_trayIcon->setToolTip(tr("VNote"));
    m_trayIcon->setContextMenu(menu);

    connect(m_trayIcon, &QSystemTrayIcon::activated,
            this, [this](QSystemTrayIcon::ActivationReason p_reason){
                if (p_reason == QSystemTrayIcon::Trigger) {
                    this->showMainWindow();
                }
            });

    m_trayIcon->show();
}

void VMainWindow::changeEvent(QEvent *p_event)
{
    if (p_event->type() == QEvent::WindowStateChange) {
        QWindowStateChangeEvent *eve = dynamic_cast<QWindowStateChangeEvent *>(p_event);
        m_windowOldState = eve->oldState();
    }

    QMainWindow::changeEvent(p_event);
}

void VMainWindow::showMainWindow()
{
    if (this->isMinimized()) {
        if (m_windowOldState & Qt::WindowMaximized) {
            this->showMaximized();
        } else if (m_windowOldState & Qt::WindowFullScreen) {
            this->showFullScreen();
        } else {
            this->showNormal();
        }
    } else {
        this->show();
        // Need to call raise() in macOS.
        this->raise();
    }

    this->activateWindow();
}

void VMainWindow::openStartupPages()
{
    StartupPageType type = g_config->getStartupPageType();
    switch (type) {
    case StartupPageType::ContinueLeftOff:
    {
        QVector<VFileSessionInfo> files = g_config->getLastOpenedFiles();
        qDebug() << "open" << files.size() << "last opened files";
        m_editArea->openFiles(files, true);
        break;
    }

    case StartupPageType::SpecificPages:
    {
        QStringList pagesToOpen = VUtils::filterFilePathsToOpen(g_config->getStartupPages());
        qDebug() << "open startup pages" << pagesToOpen;
        openFiles(pagesToOpen, false, g_config->getNoteOpenMode(), false, true);
        break;
    }

    default:
        break;
    }
}

bool VMainWindow::isHeadingSequenceApplicable() const
{
    if (!m_curTab) {
        return false;
    }

    Q_ASSERT(m_curFile);

    if (!m_curFile->isModifiable()
        || m_curFile->getDocType() != DocType::Markdown) {
        return false;
    }

    return true;
}

// Popup the attachment list if it is enabled.
bool VMainWindow::showAttachmentListByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    if (obj->m_attachmentBtn->isEnabled()) {
        // Show tool bar first.
        bool toolBarChecked = obj->m_toolBarAct->isChecked();
        if (!toolBarChecked) {
            obj->setToolBarVisible(true);

            // Make it visible first.
            QCoreApplication::sendPostedEvents();
        }

        obj->m_attachmentBtn->showPopupWidget();

        if (!toolBarChecked) {
            obj->setToolBarVisible(false);
        }
    }

    return true;
}

bool VMainWindow::locateCurrentFileByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    if (obj->m_curFile) {
        if (obj->locateFile(obj->m_curFile)) {
            return false;
        }
    }

    return true;
}

bool VMainWindow::toggleExpandModeByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    obj->expandViewAct->trigger();
    return true;
}

bool VMainWindow::currentNoteInfoByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    if (obj->noteInfoAct->isEnabled()) {
        obj->curEditFileInfo();
    }

    return true;
}

bool VMainWindow::discardAndReadByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    if (obj->m_curTab) {
        obj->m_discardExitAct->trigger();
        obj->m_curTab->setFocus();

        return false;
    }

    return true;
}

bool VMainWindow::toggleToolBarByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    obj->m_toolBarAct->trigger();
    return true;
}

bool VMainWindow::toggleToolsDockByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    obj->m_toolDock->setVisible(!obj->m_toolDock->isVisible());
    return true;
}

bool VMainWindow::toggleSearchDockByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    bool visible = obj->m_searchDock->isVisible();
    obj->m_searchDock->setVisible(!visible);
    if (!visible) {
        obj->m_searcher->focusToSearch();
        return false;
    }

    return true;
}

bool VMainWindow::closeFileByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    obj->closeCurrentFile();

    QWidget *nextFocus = obj->m_editArea->getCurrentTab();
    if (nextFocus) {
        nextFocus->setFocus();
    } else {
        obj->m_fileList->setFocus();
    }

    return false;
}

bool VMainWindow::shortcutsHelpByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    obj->shortcutsHelp();
    return false;
}

bool VMainWindow::flushLogFileByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_target);
    Q_UNUSED(p_data);

#if defined(QT_NO_DEBUG)
    // Flush g_logFile.
    g_logFile.flush();
#endif

    return true;
}

bool VMainWindow::exportByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);

    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    QTimer::singleShot(50, obj, SLOT(handleExportAct()));

    return true;
}

bool VMainWindow::focusEditAreaByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);

    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    obj->focusEditArea();
    return false;
}

void VMainWindow::promptNewNotebookIfEmpty()
{
    if (vnote->getNotebooks().isEmpty()) {
        m_notebookSelector->newNotebook();
    }
}

void VMainWindow::initShortcuts()
{
    QString keySeq = g_config->getShortcutKeySequence("CloseNote");
    qDebug() << "set CloseNote shortcut to" << keySeq;
    if (!keySeq.isEmpty()) {
        QShortcut *closeNoteShortcut = new QShortcut(QKeySequence(keySeq), this);
        closeNoteShortcut->setContext(Qt::WidgetWithChildrenShortcut);
        connect(closeNoteShortcut, &QShortcut::activated,
                this, &VMainWindow::closeCurrentFile);
    }
}

void VMainWindow::openFlashPage()
{
    openFiles(QStringList() << g_config->getFlashPage(),
              false,
              OpenFileMode::Edit,
              true);
}

void VMainWindow::openQuickAccess()
{
    const QString &qaPath = g_config->getQuickAccess();
    if (qaPath.isEmpty()) {
        VUtils::showMessage(QMessageBox::Information,
                            tr("Information"),
                            tr("Quick Access is not set."),
                            tr("Please specify the note for Quick Access in the settings dialog "
                               "or the context menu of a note."),
                            QMessageBox::Ok,
                            QMessageBox::Ok,
                            this);
        return;
    }

    openFiles(QStringList(qaPath), false, g_config->getNoteOpenMode());
}

void VMainWindow::initHeadingButton(QToolBar *p_tb)
{
    m_headingBtn = new QPushButton(VIconUtils::toolButtonIcon(":/resources/icons/heading.svg"),
                                   "",
                                   this);
    m_headingBtn->setToolTip(tr("Headings"));
    m_headingBtn->setProperty("CornerBtn", true);
    m_headingBtn->setFocusPolicy(Qt::NoFocus);
    m_headingBtn->setEnabled(false);

    QMenu *menu = new QMenu(this);
    QString text(tr("Heading %1"));
    QString tooltip(tr("Heading %1\t%2"));
    QWidgetAction *wact = new QWidgetAction(menu);
    wact->setData(1);
    VButtonMenuItem *w = new VButtonMenuItem(wact, text.arg(1), this);
    w->setToolTip(tooltip.arg(1).arg(VUtils::getShortcutText("Ctrl+1")));
    w->setProperty("Heading1", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(2);
    w = new VButtonMenuItem(wact, text.arg(2), this);
    w->setToolTip(tooltip.arg(2).arg(VUtils::getShortcutText("Ctrl+2")));
    w->setProperty("Heading2", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(3);
    w = new VButtonMenuItem(wact, text.arg(3), this);
    w->setToolTip(tooltip.arg(3).arg(VUtils::getShortcutText("Ctrl+3")));
    w->setProperty("Heading3", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(4);
    w = new VButtonMenuItem(wact, text.arg(4), this);
    w->setToolTip(tooltip.arg(4).arg(VUtils::getShortcutText("Ctrl+4")));
    w->setProperty("Heading4", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(5);
    w = new VButtonMenuItem(wact, text.arg(5), this);
    w->setToolTip(tooltip.arg(5).arg(VUtils::getShortcutText("Ctrl+5")));
    w->setProperty("Heading5", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(6);
    w = new VButtonMenuItem(wact, text.arg(6), this);
    w->setToolTip(tooltip.arg(6).arg(VUtils::getShortcutText("Ctrl+6")));
    w->setProperty("Heading6", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(0);
    w = new VButtonMenuItem(wact, tr("Clear"), this);
    w->setToolTip(tr("Clear\t%1").arg(VUtils::getShortcutText("Ctrl+7")));
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    connect(menu, &QMenu::triggered,
            this, [this, menu](QAction *p_action) {
                if (m_curTab) {
                    int level = p_action->data().toInt();
                    m_curTab->decorateText(TextDecoration::Heading, level);
                }

                menu->hide();
            });

    m_headingBtn->setMenu(menu);
    p_tb->addWidget(m_headingBtn);
}

void VMainWindow::initThemeMenu(QMenu *p_menu)
{
    QMenu *themeMenu = p_menu->addMenu(tr("Theme"));
    themeMenu->setToolTipsVisible(true);

    QAction *addAct = newAction(VIconUtils::menuIcon(":/resources/icons/add_style.svg"),
                                tr("Add Theme"),
                                themeMenu);
    addAct->setToolTip(tr("Add custom theme"));
    connect(addAct, &QAction::triggered,
            this, [this]() {
                VTipsDialog dialog(VUtils::getDocFile("tips_add_theme.md"),
                                   tr("Add Theme"),
                                   []() {
                                       QUrl url = QUrl::fromLocalFile(g_config->getThemeConfigFolder());
                                       QDesktopServices::openUrl(url);
                                   },
                                   this);
                dialog.exec();
            });

    themeMenu->addAction(addAct);

    QActionGroup *ag = new QActionGroup(this);
    connect(ag, &QActionGroup::triggered,
            this, [this](QAction *p_action) {
                QString data = p_action->data().toString();
                g_config->setTheme(data);

                promptForVNoteRestart();
            });

    QList<QString> themes = g_config->getThemes();
    QString theme = g_config->getTheme();
    for (auto const &item : themes) {
        QAction *act = new QAction(item, ag);
        act->setToolTip(tr("Set as the theme of VNote (restart VNote to make it work)"));
        act->setCheckable(true);
        act->setData(item);

        // Add it to the menu.
        themeMenu->addAction(act);

        if (theme == item) {
            act->setChecked(true);
        }
    }
}

void VMainWindow::customShortcut()
{
    VTipsDialog dialog(VUtils::getDocFile("tips_custom_shortcut.md"),
                       tr("Customize Shortcuts"),
                       []() {
#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
                           // On macOS, it seems that we could not open that ini file directly.
                           QUrl url = QUrl::fromLocalFile(g_config->getConfigFolder());
#else
                           QUrl url = QUrl::fromLocalFile(g_config->getConfigFilePath());
#endif
                           QDesktopServices::openUrl(url);
                       },
                       this);
    dialog.exec();
}

void VMainWindow::initVimCmd()
{
    m_vimCmd = new VVimCmdLineEdit(this);
    m_vimCmd->setProperty("VimCommandLine", true);

    connect(m_vimCmd, &VVimCmdLineEdit::commandCancelled,
            this, [this]() {
                if (m_curTab) {
                    m_curTab->focusTab();
                }

                // NOTICE: should not hide before setting focus to edit tab.
                m_vimCmd->hide();

                if (m_curTab) {
                    m_curTab->handleVimCmdCommandCancelled();
                }
            });

    connect(m_vimCmd, &VVimCmdLineEdit::commandFinished,
            this, [this](VVim::CommandLineType p_type, const QString &p_cmd) {
                if (m_curTab) {
                    m_curTab->focusTab();
                }

                m_vimCmd->hide();

                // Hide the cmd line edit before execute the command.
                // If we execute the command first, we will get Chinese input
                // method enabled after returning to read mode.
                if (m_curTab) {
                    m_curTab->handleVimCmdCommandFinished(p_type, p_cmd);
                }
            });

    connect(m_vimCmd, &VVimCmdLineEdit::commandChanged,
            this, [this](VVim::CommandLineType p_type, const QString &p_cmd) {
                if (m_curTab) {
                    m_curTab->handleVimCmdCommandChanged(p_type, p_cmd);
                }
            });

    connect(m_vimCmd, &VVimCmdLineEdit::requestNextCommand,
            this, [this](VVim::CommandLineType p_type, const QString &p_cmd) {
                if (m_curTab) {
                    QString cmd = m_curTab->handleVimCmdRequestNextCommand(p_type, p_cmd);
                    if (!cmd.isNull()) {
                        m_vimCmd->setCommand(cmd);
                    } else {
                        m_vimCmd->restoreUserLastInput();
                    }
                }
            });

    connect(m_vimCmd, &VVimCmdLineEdit::requestPreviousCommand,
            this, [this](VVim::CommandLineType p_type, const QString &p_cmd) {
                if (m_curTab) {
                    QString cmd = m_curTab->handleVimCmdRequestPreviousCommand(p_type, p_cmd);
                    if (!cmd.isNull()) {
                        m_vimCmd->setCommand(cmd);
                    }
                }
            });

    connect(m_vimCmd, &VVimCmdLineEdit::requestRegister,
            this, [this](int p_key, int p_modifiers){
                if (m_curTab) {
                    QString val = m_curTab->handleVimCmdRequestRegister(p_key, p_modifiers);
                    if (!val.isEmpty()) {
                        m_vimCmd->setText(m_vimCmd->text() + val);
                    }
                }
            });

    m_vimCmd->hide();
}

void VMainWindow::toggleEditReadMode()
{
    if (!m_curTab) {
        return;
    }

    if (m_curTab->isEditMode()) {
        // Save changes and read.
        m_editArea->saveAndReadFile();
    } else {
        // Edit.
        m_editArea->editFile();
    }
}

void VMainWindow::updateEditReadAct(const VEditTab *p_tab)
{
    static QIcon editIcon = VIconUtils::toolButtonIcon(":/resources/icons/edit_note.svg");
    static QString editText;
    static QIcon readIcon = VIconUtils::toolButtonIcon(":/resources/icons/save_exit.svg");
    static QString readText;

    if (editText.isEmpty()) {
        QString keySeq = g_config->getShortcutKeySequence("EditReadNote");
        QKeySequence seq(keySeq);
        if (!seq.isEmpty()) {
            QString shortcutText = VUtils::getShortcutText(keySeq);
            editText = tr("Edit\t%1").arg(shortcutText);
            readText = tr("Save Changes And Read\t%1").arg(shortcutText);

            m_editReadAct->setShortcut(seq);
        } else {
            editText = tr("Edit");
            readText = tr("Save Changes And Read");
        }
    }

    if (!p_tab || !p_tab->isEditMode()) {
        // Edit.
        m_editReadAct->setIcon(editIcon);
        m_editReadAct->setText(editText);
        m_editReadAct->setStatusTip(tr("Edit current note"));

        m_discardExitAct->setEnabled(false);
    } else {
        // Read.
        m_editReadAct->setIcon(readIcon);
        m_editReadAct->setText(readText);
        m_editReadAct->setStatusTip(tr("Save changes and exit edit mode"));

        m_discardExitAct->setEnabled(true);
    }

    m_editReadAct->setEnabled(p_tab);
}

void VMainWindow::handleExportAct()
{
    VExportDialog dialog(m_notebookSelector->currentNotebook(),
                         m_dirTree->currentDirectory(),
                         m_curFile,
                         m_cart,
                         g_config->getMdConverterType(),
                         this);
    dialog.exec();
}

VNotebook *VMainWindow::getCurrentNotebook() const
{
    return m_notebookSelector->currentNotebook();
}

void VMainWindow::activateUniversalEntry()
{
    if (!m_ue) {
        initUniversalEntry();
    }

    m_captain->setCaptainModeEnabled(false);

    // Move it to the top left corner of edit area.
    QPoint topLeft = m_editArea->mapToGlobal(QPoint(0, 0));
    QRect eaRect = m_editArea->editAreaRect();
    topLeft += eaRect.topLeft();

    // Use global position.
    m_ue->move(topLeft);

    eaRect.moveTop(0);
    m_ue->setAvailableRect(eaRect);

    m_ue->show();
    m_ue->raise();
}

void VMainWindow::initUniversalEntry()
{
    m_ue = new VUniversalEntry(this);
    m_ue->hide();

#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
    // Qt::Popup on macOS does not work well with input method.
    m_ue->setWindowFlags(Qt::Tool
                         | Qt::NoDropShadowWindowHint);
    m_ue->setWindowModality(Qt::ApplicationModal);
#else
    m_ue->setWindowFlags(Qt::Popup
                         | Qt::FramelessWindowHint
                         | Qt::NoDropShadowWindowHint);
#endif

    connect(m_ue, &VUniversalEntry::exited,
            this, [this]() {
                m_captain->setCaptainModeEnabled(true);
            });

    // Register entries.
    VSearchUE *searchUE = new VSearchUE(this);
    m_ue->registerEntry('q', searchUE, VSearchUE::Name_FolderNote_AllNotebook);
    m_ue->registerEntry('a', searchUE, VSearchUE::Content_Note_AllNotebook);
    m_ue->registerEntry('z', searchUE, VSearchUE::Tag_Note_AllNotebook);
    m_ue->registerEntry('w', searchUE, VSearchUE::Name_Notebook_AllNotebook);
    m_ue->registerEntry('e', searchUE, VSearchUE::Name_FolderNote_CurrentNotebook);
    m_ue->registerEntry('d', searchUE, VSearchUE::Content_Note_CurrentNotebook);
    m_ue->registerEntry('c', searchUE, VSearchUE::Tag_Note_CurrentNotebook);
    m_ue->registerEntry('r', searchUE, VSearchUE::Name_FolderNote_CurrentFolder);
    m_ue->registerEntry('f', searchUE, VSearchUE::Content_Note_CurrentFolder);
    m_ue->registerEntry('v', searchUE, VSearchUE::Tag_Note_CurrentFolder);
    m_ue->registerEntry('t', searchUE, VSearchUE::Name_Note_Buffer);
    m_ue->registerEntry('g', searchUE, VSearchUE::Content_Note_Buffer);
    m_ue->registerEntry('b', searchUE, VSearchUE::Outline_Note_Buffer);
    m_ue->registerEntry('u', searchUE, VSearchUE::Content_Note_ExplorerDirectory);
    m_ue->registerEntry('y', new VOutlineUE(this), 0);
    m_ue->registerEntry('h', searchUE, VSearchUE::Path_FolderNote_AllNotebook);
    m_ue->registerEntry('n', searchUE, VSearchUE::Path_FolderNote_CurrentNotebook);
    m_ue->registerEntry('m', new VListFolderUE(this), 0);
    m_ue->registerEntry('j', new VListUE(this), VListUE::History);
    m_ue->registerEntry('?', new VHelpUE(this), 0);
}

void VMainWindow::checkNotebooks()
{
    bool updated = false;
    QVector<VNotebook *> &notebooks = g_vnote->getNotebooks();
    for (int i = 0; i < notebooks.size(); ++i) {
        VNotebook *nb = notebooks[i];
        if (nb->isValid()) {
            continue;
        }

        VFixNotebookDialog dialog(nb, notebooks, this);
        if (dialog.exec()) {
            qDebug() << "fix path of notebook" << nb->getName() << "to" << dialog.getPathInput();
            nb->updatePath(dialog.getPathInput());
        } else {
            notebooks.removeOne(nb);
            --i;
        }

        updated = true;
    }

    if (updated) {
        g_config->setNotebooks(notebooks);

        m_notebookSelector->update();
    }

    m_notebookSelector->restoreCurrentNotebook();
}

void VMainWindow::setMenuBarVisible(bool p_visible)
{
    // Hiding the menubar will disable the shortcut of QActions.
    if (p_visible) {
        menuBar()->setFixedSize(QSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX));
    } else {
        menuBar()->setFixedHeight(0);
    }
}

void VMainWindow::setToolBarVisible(bool p_visible)
{
    for (auto bar : m_toolBars) {
        if (p_visible) {
            bar->setFixedSize(QSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX));
        } else {
            bar->setFixedHeight(0);
        }
    }
}

void VMainWindow::kickOffStartUpTimer(const QStringList &p_files)
{
    QTimer::singleShot(300, [this, p_files]() {
        m_syncNoteListToCurrentTab = false;

        checkNotebooks();
        QCoreApplication::sendPostedEvents();
        promptNewNotebookIfEmpty();
        QCoreApplication::sendPostedEvents();
        openStartupPages();
        openFiles(p_files, false, g_config->getNoteOpenMode(), false, true);

        checkIfNeedToShowWelcomePage();

        if (g_config->versionChanged() && !g_config->getAllowUserTrack()) {
            // Ask user whether allow tracking.
            int ret = VUtils::showMessage(QMessageBox::Information,
                                          tr("Collect User Statistics"),
                                          tr("VNote would like to send a request to count active users."
                                             "Do you allow this request?"),
                                          tr("A request to https://tamlok.github.io/user_track/vnote.html will be sent if allowed."),
                                          QMessageBox::Ok | QMessageBox::No,
                                          QMessageBox::Ok,
                                          this);
            g_config->setAllowUserTrack(ret == QMessageBox::Ok);
        }

        if (g_config->getAllowUserTrack()) {
            QTimer::singleShot(30 * 1000, this, SLOT(collectUserStat()));
        }

        m_syncNoteListToCurrentTab = true;

        g_config->updateLastStartDateTime();
    });
}

void VMainWindow::showNotebookPanel()
{
    changePanelView(PanelViewState::VerticalMode);
    m_naviBox->setCurrentIndex(NaviBoxIndex::NotebookPanel, false);
}

void VMainWindow::showExplorerPanel(bool p_focus)
{
    changePanelView(PanelViewState::VerticalMode);
    m_naviBox->setCurrentIndex(NaviBoxIndex::Explorer, p_focus);
}

void VMainWindow::stayOnTop(bool p_enabled)
{
    bool shown = isVisible();
    Qt::WindowFlags flags = this->windowFlags();

    Qt::WindowFlags magicFlag = Qt::WindowStaysOnTopHint;
    if (p_enabled) {
        setWindowFlags(flags | magicFlag);
    } else {
        setWindowFlags(flags ^ magicFlag);
    }

    if (shown) {
        show();
    }
}

void VMainWindow::focusEditArea() const
{
    QWidget *widget = m_editArea->getCurrentTab();
    if (!widget) {
        widget = m_editArea;
    }

    widget->setFocus();
}

void VMainWindow::setCaptainModeEnabled(bool p_enabled)
{
    m_captain->setCaptainModeEnabled(p_enabled);
}

void VMainWindow::initUpdateTimer()
{
    m_updateTimer = new QTimer(this);
    m_updateTimer->setSingleShot(true);
    m_updateTimer->setInterval(200);
    connect(m_updateTimer, &QTimer::timeout,
            this, [this]() {
                m_fileToolBar->update();
                m_viewToolBar->update();
                m_editToolBar->update();
                m_noteToolBar->update();
            });
}

void VMainWindow::restartVNote()
{
    QCoreApplication::exit(RESTART_EXIT_CODE);
}

void VMainWindow::updateFontOfAllTabs()
{
    QVector<VEditTab *> tabs = m_editArea->getAllTabs();
    for (auto tab : tabs) {
        const VMdTab *mdTab = dynamic_cast<const VMdTab *>(tab);
        if (mdTab && mdTab->getEditor()) {
            mdTab->getEditor()->updateFontAndPalette();
        }
    }
}

void VMainWindow::splitFileListOut(bool p_enabled)
{
    showNotebookPanel();

    g_config->setEnableSplitFileList(p_enabled);

    setupFileListSplitOut(p_enabled);

    g_config->setNotebookSplitterState(m_nbSplitter->saveState());
}

void VMainWindow::setupFileListSplitOut(bool p_enabled)
{
    m_fileList->setEnableSplitOut(p_enabled);
    if (p_enabled) {
        m_nbSplitter->setOrientation(Qt::Horizontal);
        m_nbSplitter->setStretchFactor(0, 0);
        m_nbSplitter->setStretchFactor(1, 1);
    } else {
        m_nbSplitter->setOrientation(Qt::Vertical);
        m_nbSplitter->setStretchFactor(0, 1);
        m_nbSplitter->setStretchFactor(1, 2);
    }
}

void VMainWindow::collectUserStat() const
{
    // One request per day.
    auto lastCheckDate = g_config->getLastUserTrackDate();
    if (lastCheckDate != QDate::currentDate()) {
        g_config->updateLastUserTrackDate();

        qDebug() << "send user track" << QDate::currentDate();

        QWebEnginePage *page = new QWebEnginePage;
        page->load(QUrl("https://tamlok.github.io/user_track/vnote.html"));
        connect(page, &QWebEnginePage::loadFinished,
                this, [page](bool) {
                    VUtils::sleepWait(2000);
                    page->deleteLater();
                });
    }

    QTimer::singleShot(30 * 60 * 1000, this, SLOT(collectUserStat()));
}

void VMainWindow::promptForVNoteRestart()
{
    int ret = VUtils::showMessage(QMessageBox::Information,
                                  tr("Restart Needed"),
                                  tr("Do you want to restart VNote now?"),
                                  tr("VNote needs to restart to apply new configurations."),
                                  QMessageBox::Ok | QMessageBox::No,
                                  QMessageBox::Ok,
                                  this);
    if (ret == QMessageBox::Ok) {
        restartVNote();
    }
}

void VMainWindow::checkIfNeedToShowWelcomePage()
{
    if (g_config->versionChanged()
        || (QDate::currentDate().dayOfYear() % 64 == 1
            && g_config->getLastStartDateTime().date() != QDate::currentDate())) {
        QString docFile = VUtils::getDocFile("welcome.md");
        VFile *file = vnote->getFile(docFile, true);
        m_editArea->openFile(file, OpenFileMode::Read);
    }
}
